NEET 2026 — Botany Questions with Answers
All 189 Botany previous-year questions from NEET 2026, each with the correct answer and a full explanation. Practise them as a free, timed mock test with instant scoring.
Practice Botany as a timed test →- Q1.Biotechnology
Identify the correct sequence of steps in each cycle of Polymerase Chain Reaction :
- a)(1) Extension\( o\)Annealing\( o\)Denaturation
- b)(2) Annealing\( o\)Denaturation\( o\)Extension
- c)(3) Denaturation\( o\)Extension\( o\)Annealing
- d)(4) Denaturation\( o\)Annealing\( o\)Extension
- Q2.Cell Biology
Match List I with List II : List I List II (Phase of cell cycle) (Activity) A. \(G_1\) phase I. Actual cell division occurs B. S phase II. Cell is metabolically active and continuously grows but does not replicate its DNA C. \(G_2\) phase III. Synthesis of DNA occurs and the amount of DNA per cell doubles D. M phase IV. Proteins are synthesized while cell growth continues Choose the correct answer from the options given below :
- a)(1) A-IV, B-I, C-II, D-III
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-III, B-IV, C-I, D-II
- d)(4) A-II, B-III, C-IV, D-I
- Q3.Biodiversity Conservation
Which of the following statements are correct? A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss. B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans. C. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake. D. Water hyacinth is an invasive species. E. When a species becomes extinct, the plant and animal species associated with it are not affected. Choose the correct answer from the options given below :
- a)(1) A, B and E only
- b)(2) A, B and D only
- c)(3) C, D and E only
- d)(4) B, C and D only
- Q4.Molecular Biology
Which of the following statements are correct with reference to a transcription unit? A. A transcription unit in DNA is defined primarily by three regions : promoter, structural gene and terminator. B. The promoter is said to be located towards the \(5^{'}\)-end of the structural gene. C. The promoter is a DNA sequence that provides binding site for RNA polymerase. D. The promoter defines the template and coding strands. E. The terminator is located towards the \(3^{'}\)-end of the coding strand and it defines the end of the process of transcription. Choose the correct answer from the options given below :
- a)(1) A, B, C and D only
- b)(2) A, C, D and E only
- c)(3) B, C, D and E only
- d)(4) A, B, C, D and E
- Q5.Biology Taxonomy
Which one of the following statements is not true about the universal rules of binomial nomenclature?
- a)Biological names are generally in Latin.
- b)Both the words in a biological name, when handwritten, are separately underlined or printed in italics.
- c)The specific epithet in the biological name starts with a small letter.
- d)The first word in the biological name represents the specific epithet, while the second component denotes the genus.
- Q6.Ecosystem Functions
Match List I with List II: List I A. Decomposition B. Detritus C. Mineralisation D. Humification List II I. Accumulation of dark coloured amorphous colloidal substance II. Release of inorganic nutrients by the activity of microbes in soil III. Breaking down of complex organic matter into inorganic substances IV. Dead remains of plants and animals including fecal matter Choose the correct answer from the options given below:
- a)A-IV, B-III, C-I, D-II
- b)A-III, B-IV, C-II, D-I
- c)A-I, B-II, C-III, D-IV
- d)A-II, B-I, C-III, D-IV
- Q7.Cell Biology
Which one of the following is the site for active ribosomal RNA synthesis?
- a)Centrosome
- b)Chromatin
- c)Nucleolus
- d)Kinetochore
- Q8.Cellular Respiration
\(2 (\ce{C_{51}H_{98}O_6}) + 145 \ce{O_2} ightarrow 102 \ce{CO_2} + 98 \ce{H_2O} + ext{energy}\) The Respiratory Quotient (RQ) of a biomolecule used for respiration, as per the above equation, would be:
- a)Between 0.5 and 0.95
- b)Less than 0.5
- c)1.0
- d)Between 1.25 and 2
- Q9.Genetics
Match List I with List II: List I A. Incomplete dominance B. Co-dominance C. Pleiotropy D. Polygenic inheritance List II I. Human skin colour II. Inheritance of flower colour in extit{Antirrhinum} sp. III. Phenylketonuria disease in humans IV. ABO blood groups Choose the correct answer from the options given below:
- a)A-II, B-IV, C-III, D-I
- b)A-I, B-III, C-II, D-IV
- c)A-I, B-IV, C-III, D-II
- d)A-II, B-I, C-III, D-IV
- Q10.Molecular Biology
Arrange the following steps of DNA fingerprinting in a correct sequence. A. Isolation of DNA and its digestion by restriction endonucleases. B. Hybridisation using a labelled VNTR probe. C. Transferring of separated DNA fragments to synthetic membranes. D. Detection of hybridised DNA fragments by autoradiography. E. Separation of DNA fragments by electrophoresis. Choose the correct answer from the options given below:
- a)A, B, D, C, E
- b)A, D, B, E, C
- c)A, E, C, B, D
- d)A, E, B, C, D
- Q11.DNA Structure
Which of the following statements are correct with reference to packaging of DNA helix? A. Histones are organized to form a unit of eight molecules called histone octamer. B. Histones are negatively charged basic proteins. C. Histones are rich in the basic amino acid residues – lysine and arginine. D. The positively charged DNA is wrapped around the histone octamer to form nucleosome. E. The packaging of chromatin at higher levels requires an additional set of proteins called non-histone chromosomal proteins. Choose the correct answer from the options given below:
- a)A, C and E only
- b)B, D and E only
- c)C, D and E only
- d)A, B and D only
- Q12.Photosynthesis
Find the incorrect statement(s) about photosynthesis from the following: A. The water splitting complex is associated with \( ext{PS I}\). B. \( ext{C}_4\) plants use the \( ext{C}_3\) pathway of \( ext{CO}_2\) fixation as the main biosynthetic pathway. C. In \( ext{C}_4\) plants, photorespiration does not occur. D. \( ext{C}_3\) plants exhibit 'Kranz' anatomy. E. ATP synthesis in chloroplast occurs through chemiosmosis. Choose the answer from the options given below:
- a)B and C only
- b)B only
- c)B and E only
- d)A and D only
- Q13.Plant Biotechnology
Arrange the following steps of somatic hybridisation in a correct sequence. A. Digestion of cell walls. B. Isolation of naked protoplasts. C. Fusion of protoplasts to get hybrid protoplast. D. Isolation of single cells from two different varieties of plants. E. Growing of hybrid protoplast to form a new plant. Choose the correct answer from the options given below:
- a)D, A, B, C, E
- b)E, B, A, D, C
- c)D, B, A, E, C
- d)E, A, B, C, D
- Q14.Plant Anatomy
Match List I with List II: List I A. Conjunctive tissue B. Casparian strips C. Subsidiary cells D. Starch sheath List II I. Specialised cells in the vicinity of guard cells II. Endodermal cells rich in starch III. Tissue between xylem and phloem IV. Endodermal cells with suberin deposition Choose the correct answer from the options given below:
- a)A-IV, B-III, C-I, D-II
- b)A-III, B-IV, C-II, D-I
- c)A-III, B-IV, C-I, D-II
- d)A-IV, B-III, C-II, D-I
- Q15.Plant Growth
Which one of the following is not a characteristic of plant cells in the phase of elongation?
- a)New cell wall deposition
- b)Cell enlargement
- c)Increased vacuolation
- d)Large conspicuous nuclei
- Q16.Plant hormones
Match List I with List II : List I List II (Growth (Function/Effect) Regulator) A. 2,4-D I. Brewing industry B. \( ext{GA}_{3}\) II. Stimulation of stomatal closure C. Kinetin, III. Herbicide D. ABA IV. Nutrient mobilisation Choose the correct answer from the options given below:
- a)A-III, B-I, C-IV, D-II
- b)A-IV, B-III, C-II, D-I
- c)A-I, B-IV, C-III, D-II
- d)A-I, B-II, C-IV, D-III
- Q17.Photosynthesis enzymes
The enzyme required for carboxylation in the Calvin cycle is :
- a)Hexokinase
- b)PEP carboxylase
- c)RuBP carboxylase - oxygenase
- d)Carboxypeptidase
- Q18.Calvin cycle energetics
How many ATP and NADPH molecules are required to make one molecule of glucose through the Calvin pathway?
- a)18 ATP and 12 NADPH
- b)12 ATP and 18 NADPH
- c)24 ATP and 18 NADPH
- d)6 ATP and 12 NADPH
- Q19.Plant morphology
Which of the following floral formula is the correct floral formula of Solanaceae family?
- a)\(\oplus \unicode{x26A7} ext{ K}_{(5)} ext{ C}_{(5)} \overline{ ext{A}}_{5} ext{ G}_{(2)}\)
- b)\(\oplus \unicode{x26A7} ext{ K}_{5} ext{ C}_{(5)} \overline{ ext{A}}_{5} ext{ G}_{(2)}\)
- c)\(\oplus \unicode{x26A7} ext{ K}_{5} ext{ C}_{5} \overline{ ext{A}}_{5} ext{ G}_{(2)}\)
- d)\(\oplus \unicode{x26A7} ext{ K}_{5} ext{ C}_{(5)} ext{ A}_{5} ext{ G}_{(2)}\)
- Q20.Biodiversity conservation
Which of the following is an *in situ* conservation method ?
- a)Sacred Groves
- b)Wildlife Safari Parks
- c)Botanical Gardens
- d)Seed Banks
- Q21.Genetic engineering
Which of the following statements are *not* true regarding restriction endonucleases? A. They are called molecular scissors. B. These are the enzymes responsible for restricting the growth of bacteriophages in E. coli. C. They cut the DNA only at the centre of the palindromic sites. D. They remove nucleotides only from the ends of DNA fragments. E. They recognise specific palindromic base-pair sequences. Choose the answer from the options given below :
- a)A and B only
- b)A and E only
- c)D and E only
- d)C and D only
- Q22.Plant morphology
In racemose inflorescence,
- a)the main axis terminates in a flower
- b)flowers are solitary
- c)the growth is limited
- d)flowers are borne in an acropetal succession
- Q23.Plant reproduction
Arrange the following in the correct developmental sequence related to microsporogenesis : A. Microspore tetrads B. Sporogenous tissue C. Pollen grains D. Pollen mother cells Choose the correct answer from the options given below :
- a)D, A, C, B
- b)B, D, A, C
- c)B, D, C, A
- d)A, D, C, B
- Q24.Biomolecules
Identify the correct statements about biomolecules. A. Lipids are generally water soluble. B. Proteins are polypeptides. C. Polysaccharides are long chains of sugars. D. Adenine and guanine are substituted pyrimidines. E. Almost all enzymes are proteins. Choose the correct answer from the options given below:
- a)B, D and E only
- b)B, C and E only
- c)A, B and C only
- d)C, D and E only
- Q25.Genetics
Which of the following statements are true with reference to the sex-determination in honeybees? A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). B. An unfertilized egg develops as a male by parthenogenesis. C. A male has half the number of chromosomes than that of a female. D. Males produce sperms by meiosis. E. Honeybees have a haplodiploid sex-determination system. Choose the correct answer from the options given below:
- a)A, B, C and E only
- b)B, C, D and E only
- c)A, B, C and D only
- d)A, B, D and E only
- Q26.Plant physiology
Heterophyllous development in response to environment is an example of which of the following phenomena?
- a)Redifferentiation
- b)Elasticity
- c)Dedifferentiation
- d)Plasticity
- Q27.Amino acids
Which of the following statements are correct regarding amino acids? A. They are substituted methanes. B. Serine is an aromatic amino acid. C. Valine is a neutral amino acid. D. Lysine is an acidic amino acid. Choose the correct answer from the options given below:
- a)C and D only
- b)B and C only
- c)A and C only
- d)A and B only
- Q28.Biodiversity
"The Evil Quartet" of biodiversity loss includes which of the following?
- a)Over-exploitation; Alien species invasions; Air pollution; Co-extinctions
- b)Habitat loss and fragmentation; Air pollution; Water pollution; Co-extinctions
- c)Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions
- d)Over-exploitation; Alien species invasions; Soil pollution; Co-extinctions
- Q29.Cellular respiration
Match List I with List II : List I (Process) A. Glycolysis B. ETS C. Accumulation of protons D. Krebs' cycle List II (Location) I. Inner mitochondrial membrane II. Mitochondrial matrix III. Cytoplasm IV. Intermembrane space Choose the correct answer from the options given below:
- a)A-IV, B-II, C-I, D-III
- b)A-II, B-III, C-IV, D-I
- c)A-III, B-I, C-IV, D-II
- d)A-I, B-IV, C-III, D-II
- Q30.Plant reproduction
Which one of the following is a triploid cell?
- a)(1) Synergid
- b)(2) Central cell
- c)(3) Zygote
- d)(4) Primary endosperm cell
- Q31.Plant reproduction
Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?
- a)(1) Autogamy
- b)(2) Xenogamy
- c)(3) Geitonogamy
- d)(4) Cleistogamy
- Q32.Plant Morphology
Match List I with List II: List I List II (Placentation) (Example) A. Marginal I. Mustard B. Axile II. Pea C. Parietal III. Marigold D. Basal IV. Lemon Choose the correct answer from the options given below:
- a)(1) A-II, B-IV, C-I, D-III
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-III, B-I, C-IV, D-II
- d)(4) A-IV, B-II, C-I, D-III
- Q33.Biological Classification
The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included: A. Cell structure B. Body organization C. Presence of flagellum D. Reproduction E. Phylogenetic relationships Choose the correct answer from the options given below :
- a)(1) A, B, C, D and E
- b)(2) B, C and D only
- c)(3) A, B, D and E only
- d)(4) A, B and E only
- Q34.Biomolecules
Match List I with List II: List I List II A. Trypsin I. Intercellular ground substance B. Morphine II. Lectin C. Concanavalin A III. Enzyme D. Collagen IV. Alkaloid Choose the correct answer from the options given below:
- a)(1) A-III, B-IV, C-II, D-I
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-IV, B-III, C-II, D-I
- d)(4) A-III, B-II, C-IV, D-I
- Q35.Molecular Biology
Which of the following statements are correct with respect to DNA separation, isolation and visualization? A. The cutting of DNA is done by molecular scissors. B. The DNA fragments separate according to their size in an agarose gel, upon electrophoresis. C. The separated DNA fragments can be seen without staining when exposed to UV light. D. The separated DNA fragments, when stained with ethidium bromide, can be seen in visible light. Choose the correct answer from the options given below:
- a)(1) B and D only
- b)(2) A and B only
- c)(3) B and C only
- d)(4) A and D only
- Q36.Genetic Disorders
Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule?
- a)(1) Thalassemia
- b)(2) Sickle-cell anaemia
- c)(3) Phenylketonuria
- d)(4) Haemophilia
- Q37.Plant Anatomy
In angiosperms, root hairs arise from which one of the following regions of the root?
- a)(1) The root cap zone
- b)(2) The region of meristematic activity
- c)(3) The region of elongation
- d)(4) The region of maturation
- Q38.Plant morphology
In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?
- a)(1) Funaria
- b)(2) Pinus
- c)(3) Selaginella
- d)(4) Wolffia
- Q39.Molecular biology
In the \(\ce{lac}\) operon, the \(\ce{z}\) gene codes for :
- a)(1) permease
- b)(2) transacetylase
- c)(3) beta-galactosidase
- d)(4) the repressor of \(\ce{lac}\) operon
- Q40.Biodiversity concepts
Exploring molecular, genetic and species-level diversity for products of economic importance is called :
- a)(1) Biofortification
- b)(2) Bioremediation
- c)(3) Bioprospecting
- d)(4) Biomagnification
- Q41.Biotechnology tools
Match List I with List II: List I List II A. Genetically modified organism I. Agrobacterium tumefaciens B. Thermostable DNA polymerase II. Bt cotton C. Ti plasmid III. Thermus aquaticus D. pBR322 IV. Escherichia coli Choose the correct answer from the options given below :
- a)(1) A-II, B-III, C-I, D-IV
- b)(2) A-I, B-II, C-IV, D-III
- c)(3) A-I, B-III, C-IV, D-II
- d)(4) A-I, B-II, C-I, D-IV
- Q42.Ecosystem productivity
Match List I with List II: List I List II A. Productivity I. Gross primary productivity minus respiration losses B. Net primary productivity II. Rate of formation of new organic matter by consumers C. Gross primary productivity III. Rate of biomass production D. Secondary productivity IV. Rate of production of organic matter during photosynthesis Choose the correct answer from the options given below
- a)(1) A-III, B-I, C-IV, D-II
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-I, B-III, C-IV, D-II
- d)(4) A-III, B-I, C-II, D-IV
- Q43.Biodiversity loss
Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes ?
- a)(1) The present net species extinction rate is zero.
- b)(2) The current species extinction rate is nearly 10 times faster than that in previous episodes.
- c)(3) The present species extinction rates are 100 to 1000 times faster than in the pre-human times.
- d)(4) The current species extinction rates are far lower than those in previous episodes.
- Q44.Biomolecule structure
Alpha-helix is found in which level of protein structure ?
- a)(1) Secondary structure
- b)(2) Tertiary structure
- c)(3) Primary structure
- d)(4) Quaternary structure
- Q45.Plant anatomy
The main function of bulliform cells in grasses is :
- a)(1) to make the leaf impermeable to fungal spores.
- b)(2) to transport water.
- c)(3) to perform photosynthesis.
- d)(4) to minimize water loss during water stress.
- Q46.Photosynthesis enzymes
The enzyme required for carboxylation in the Calvin cycle is:
- a)(1) Carboxypeptidase
- b)(2) \ce{PEP} carboxylase
- c)(3) \ce{RuBP} carboxylase – oxygenase
- d)(4) Hexokinase
- Q47.Biomolecules types
Match List I with List II : List I A. Trypsin B. Morphine C. Concanavalin A D. Collagen List II I. Intercellular ground substance II. Lectin III. Enzyme IV. Alkaloid Choose the correct answer from the options given below:
- a)(1) A-III, B-IV, C-II, D-I
- b)(2) A-III, B-II, C-IV, D-I
- c)(3) A-I, B-II, C-III, D-IV
- d)(4) A-IV, B-III, C-II, D-I
- Q48.Amino acid classification
Which of the following statements are correct regarding amino acids? A. They are substituted methanes. B. Serine is an aromatic amino acid. C. Valine is a neutral amino acid. D. Lysine is an acidic amino acid. Choose the correct answer from the options given below:
- a)C and D only
- b)A and C only
- c)B and C only
- d)A and B only
- Q49.Genetic disorders causes
Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule?
- a)Thalassamia
- b)Haemophilia
- c)Sickle-cell anaemia
- d)Phenylketonuria
- Q50.Cell biology organelles
Which one of the following is the site for active ribosomal RNA synthesis?
- a)Kinetochore
- b)Centrosome
- c)Chromatin
- d)Nucleolus
- Q51.Taxonomy nomenclature rules
Which one of the following statements is *not* true about the universal rules of binomial nomenclature?
- a)Both the words in a biological name, when handwritten, are separately underlined or printed in italics.
- b)Biological names are generally in Latin.
- c)The specific epithet in the biological name starts with a small letter.
- d)The first word in the biological name represents the specific epithet, while the second component denotes the genus.
- Q52.Plant Physiology
Match List I with List II: List I (Growth Regulator) A. 2,4-D B. \( ext{GA}_{3}\) C. Kinetin D. ABA List II (Function/Effect) I. Brewing industry II. Stimulation of stomatal closure III. Herbicide IV. Nutrient mobilisation Choose the correct answer from the options given below:
- a)A-IV, B-III, C-II, D-I
- b)A-I, B-II, C-IV, D-III
- c)A-I, B-IV, C-III, D-II
- d)A-III, B-I, C-IV, D-II
- Q53.Plant Anatomy
Match List I with List II: List I A. Conjunctive tissue B. Casparian strips C. Subsidiary cells D. Starch sheath List II I. Specialised cells in the vicinity of guard cells II. Endodermal cells rich in starch III. Tissue between xylem and pholem IV. Endodermal cells with suberin deposition Choose the correct answer from the options given below:
- a)A-III, B-IV, C-I, D-II
- b)A-IV, B-III, C-I, D-II
- c)A-IV, B-III, C-II, D-I
- d)A-III, B-IV, C-II, D-I
- Q54.Plant Reproduction
Which one of the following types of pollination brings genetically different types of pollen grains to the stigma?
- a)Cleistogamy
- b)Autogamy
- c)Geitonogamy
- d)Xenogamy
- Q55.Plant Development
Heterophyllous development in response to environment is an example of which of the following phenomena ?
- a)(1) Plasticity
- b)(2) Dedifferentiation
- c)(3) Redifferentiation
- d)(4) Elasticity
- Q56.Biotechnology
Which of the following statements are not true regarding restriction endonucleases? A. They are called molecular scissors. B. These are the enzymes responsible for restricting the growth of bacteriophages in E. coli. C. They cut the DNA only at the centre of the palindromic sites. D. They remove nucleotides only from the ends of DNA fragments. E. They recognise specific palindromic base-pair sequences. Choose the answer from the options given below :
- a)(1) A and E only
- b)(2) D and E only
- c)(3) A and B only
- d)(4) C and D only
- Q57.Biotechnology
Arrange the following steps of DNA fingerprinting in a correct sequence. A. Isolation of DNA and its digestion by restriction endonucleases. B. Hybridisation using a labelled VNTR probe. C. Transferring of separated DNA fragments to synthetic membranes. D. Detection of hybridised DNA fragments by autoradiography. E. Separation of DNA fragments by electrophoresis. Choose the correct answer from the options given below :
- a)(1) A, B, D, C, E
- b)(2) A, E, C, B, D
- c)(3) A, D, B, E, C
- d)(4) A, E, B, C, D
- Q58.Plant Physiology
Find the incorrect statement(s) about photosynthesis from the following : A. The water splitting complex is associated with PS I. B. \ce{C4} plants use the \ce{C3} pathway of \ce{CO2} fixation as the main biosynthetic pathway. C. In \ce{C4} plants, photorespiration does not occur. D. \ce{C3} plants exhibit 'Kranz' anatomy. E. ATP synthesis in chloroplast occurs through chemiosmosis. Choose the answer from the options given below :
- a)(1) B and C only
- b)(2) B only
- c)(3) A and D only
- d)(4) B and E only
- Q59.Plant Biotechnology
Arrange the following steps of somatic hybridisation in a correct sequence. A. Digestion of cell walls. B. Isolation of naked protoplasts. C. Fusion of protoplasts to get hybrid protoplast. D. Isolation of single cells from two different varieties of plants. E. Growing of hybrid protoplast to form a new plant. Choose the correct answer from the options given below :
- a)(1) E, A, B, C, D
- b)(2) D, B, A, E, C
- c)(3) E, B, A, D, C
- d)(4) D, A, B, C, E
- Q60.Plant Anatomy
The main function of bulliform cells in grasses is:
- a)(1) to make the leaf impermeable to fungal spores.
- b)(2) to perform photosynthesis.
- c)(3) to minimize water loss during water stress.
- d)(4) to transport water.
- Q61.Plant Reproduction
Arrange the following in the correct developmental sequence related to microsporogenesis: A. Microspore tetrads B. Sporogenous tissue C. Pollen grains D. Pollen mother cells Choose the correct answer from the options given below:
- a)(1) D, A, C, B
- b)(2) B, D, C, A
- c)(3) A, D, C, B
- d)(4) B, D, A, C
- Q62.Biodiversity Conservation
Which of the following is an extit{in situ} conservation method ?
- a)(1) Seed Banks
- b)(2) Wildlife Safari Parks
- c)(3) Botanical Gardens
- d)(4) Sacred Groves
- Q63.Plant Reproduction
Which one of the following is a triploid cell ?
- a)(1) Zygote
- b)(2) Central cell
- c)(3) Primary endosperm cell
- d)(4) Synergid
- Q64.Biodiversity Loss
Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes ?
- a)(1) The current species extinction rates are far lower than those in previous episodes.
- b)(2) The current species extinction rate is nearly 10 times faster than that in previous episodes.
- c)(3) The present net species extinction rate is zero.
- d)(4) The present species extinction rates are 100 to 1000 times faster than in the pre-human times.
- Q65.Molecular Biology
In the extit{lac operon}, the extit{z} gene codes for :
- a)(1) permease
- b)(2) the repressor of extit{lac operon}
- c)(3) transacetylase
- d)(4) beta-galactosidase
- Q66.Plant Morphology
In racemose inflorescence,
- a)(1) flowers are borne in an acropetal succession
- b)(2) flowers are solitary
- c)(3) the growth is limited
- d)(4) the main axis terminates in a flower
- Q67.Biological Classification
The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included: A. Cell structure B. Body organization C. Presence of flagellum D. Reproduction E. Phylogenetic relationships Choose the correct answer from the options given below:
- a)(1) A, B, C, D and E
- b)(2) A, B, D and E only
- c)(3) B, C and D only
- d)(4) A, B and E only
- Q68.Biodiversity Conservation
“The Evil Quartet” of biodiversity loss includes which of the following ?
- a)(1) Habitat loss and fragmentation; Over-exploitation; Alien species invasions; Co-extinctions
- b)(2) Over-exploitation; Alien species invasions; Air pollution; Co-extinctions
- c)(3) Habitat loss and fragmentation; Air pollution; Water pollution; Co-extinctions
- d)(4) Over-exploitation; Alien species invasions; Soil pollution; Co-extinctions
- Q69.Biotechnology Techniques
Identify the correct sequence of steps in each cycle of Polymerase Chain Reaction :
- a)(1) Annealing \(\rightarrow\) Denaturation \(\rightarrow\) Extension
- b)(2) Extension \(\rightarrow\) Annealing \(\rightarrow\) Denaturation
- c)(3) Denaturation \(\rightarrow\) Extension \(\rightarrow\) Annealing
- d)(4) Denaturation \(\rightarrow\) Annealing \(\rightarrow\) Extension
- Q70.Molecular Biology
Which of the following statements are correct with reference to packaging of DNA helix? A. Histones are organized to form a unit of eight molecules called histone octamer. B. Histones are negatively charged basic proteins. C. Histones are rich in the basic amino acid residues – lysine and arginine. D. The positively charged DNA is wrapped around the histone octamer to form nucleosome. E. The packaging of chromatin at higher levels requires an additional set of proteins called non-histone chromosomal proteins. Choose the correct answer from the options given below:
- a)(1) A, B and D only
- b)(2) B, D and E only
- c)(3) A, C and E only
- d)(4) C, D and E only
- Q71.Biotechnology Principles
Which of the following statements are correct with respect to DNA separation, isolation and visualization? A. The cutting of DNA is done by molecular scissors. B. The DNA fragments separate according to their size in an agarose gel, upon electrophoresis. C. The separated DNA fragments can be seen without staining when exposed to UV light. D. The separated DNA fragments, when stained with ethidium bromide, can be seen in visible light. Choose the correct answer from the options given below:
- a)(1) B and C only
- b)(2) B and D only
- c)(3) A and B only
- d)(4) A and D only
- Q72.Biochemistry
Alpha-helix is found in which level of protein structure?
- a)(1) Tertiary structure
- b)(2) Quaternary structure
- c)(3) Secondary structure
- d)(4) Primary structure
- Q73.Ecology
Match List I with List II : List I A. Productivity B. Net primary productivity C. Gross primary productivity D. Secondary productivity List II I. Gross primary productivity minus respiration losses II. Rate of formation of new organic matter by consumers III. Rate of biomass production IV. Rate of production of organic matter during photosynthesis Choose the correct answer from the options given below :
- a)(1) A-III, B-I, C-IV, D-II
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-II, B-I, C-II, D-IV
- d)(4) A-I, B-III, C-IV, D-II
- Q74.Plant Morphology
Match List I with List II : List I (Placentation) A. Marginal B. Axile C. Parietal D. Basal List II (Example) I. Mustard II. Pea III. Marigold IV. Lemon Choose the correct answer from the options given below :
- a)(1) A-I, B-III, C-II, D-IV
- b)(2) A-IV, B-II, C-I, D-III
- c)(3) A-II, B-IV, C-I, D-III
- d)(4) A-III, B-I, C-IV, D-II
- Q75.Cell Biology
Select the correct statements regarding cell membrane in eukaryotic cell. A. Membrane of human RBCs has approximately 52% protein. B. Major phospholipids are arranged in a bilayer. C. Extensions of the plasma membrane into the cell form mesosomes. D. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium. E. Glycocalyx is present on the outer surface of the plasma membrane. Choose the correct answer from the options given below:
- a)C, D and E only
- b)B, C and E only
- c)A, C and E only
- d)A, B and D only
- Q76.Cell Biology
Choose the correct statements regarding cell organelles and their inclusions. A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria. B. Rough endoplasmic reticulum bears ribosomes on its surface. C. Both mitochondria and plastids have circular DNA. D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton. E. Mitochondrion is a single membrane-bound structure. Choose the correct answer from the options given below:
- a)A, B and C only
- b)A and B only
- c)C, D and E only
- d)B, C and D only
- Q77.Evolution Chronology
Match List I with List II with respect to chronology of evolution of life forms: List I List II A. About 65 mya I. Jawless fish probably evolved B. About 500 mya II. The dinosaurs suddenly disappeared from the earth C. About 350 mya III. Seaweeds and few plants probably existed D. About 320 mya IV. Invertebrates were formed and became active Choose the correct answer from the options given below:
- a)(1) A-II, B-IV, C-I, D-III
- b)(2) A-I, B-II, C-III, D-IV
- c)(3) A-III, B-IV, C-I, D-II
- d)(4) A-II, B-IV, C-III, D-I
- Q78.Molecular Biology
The correct statement with regard to the secondary structure of DNA/RNA is :
- a)(1) DNA possesses a single strand helix structure and contains uracil as one of the four bases.
- b)(2) DNA possesses a double strand helix structure and contains thymine as one of the four bases.
- c)(3) RNA possesses a double strand helix structure and contains uracil as one of the four bases.
- d)(4) RNA possesses a single strand helix structure and contains thymine as one of the four bases.
- Q79.Cell Cycle
Match List I with List II : List I (Phase of cell cycle) A. G₁ phase B. S phase C. G₂ phase D. M phase List II (Activity) I. Actual cell division occurs II. Cell is metabolically active and continuously grows but does not replicate its DNA III. Synthesis of DNA occurs and the amount of DNA per cell doubles IV. Proteins are synthesized while cell growth continues Choose the correct answer from the options given below :
- a)A-II, B-III, C-IV, D-I
- b)A-IV, B-I, C-II, D-III
- c)A-III, B-IV, C-I, D-II
- d)A-I, B-II, C-III, D-IV
- Q80.Principles of Genetics
Match List I with List II : List I A. Incomplete dominance B. Co-dominance C. Pleiotropy D. Polygenic inheritance List II I. Human skin colour II. Inheritance of flower colour in Antirrhinum sp. III. Phenylketonuria disease in humans IV. ABO blood groups Choose the correct answer from the options given below :
- a)A-II, B-IV, C-III, D-I
- b)A-I, B-IV, C-III, D-II
- c)A-I, B-III, C-II, D-IV
- d)A-II, B-I, C-III, D-IV
- Q81.Biodiversity Conservation
Which of the following statements are correct? A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss. B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans. C. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake. D. Water hyacinth is an invasive species. E. When a species becomes extinct, the plant and animal species associated with it are not affected. Choose the correct answer from the options given below :
- a)B, C and D only
- b)A, B and D only
- c)A, B and E only
- d)C, D and E only
- Q82.
Which of the following statements are correct with reference to a transcription unit? A. A transcription unit in DNA is defined primarily by three regions: promoter, structural gene and terminator. B. The promoter is said to be located towards the 5'-end of the structural gene. C. The promoter is a DNA sequence that provides binding site for RNA polymerase. D. The promoter defines the template and coding strands. E. The terminator is located towards the 3'-end of the coding strand and it defines the end of the process of transcription. Choose the correct answer from the options given below :
- a)A, C, D and E only
- b)A, B, C, D and E
- c)A, B, C and D only
- d)B, C, D and E only
- Q83.
Which of the following statements are true with reference to the sex-determination in honeybees? A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). B. An unfertilized egg develops as a male by parthenogenesis. C. A male has half the number of chromosomes than that of a female. D. Males produce sperms by meiosis. E. Honeybees have a haplodiploid sex-determination system. Choose the correct answer from the options given below:
- a)(1) A, B, C and E only
- b)(2) B, C, D and E only
- c)(3) A, B, C and D only
- d)(4) A, B, D and E only
- Q84.
Match List I with List II : List I (Process) A. Glycolysis B. ETS C. Accumulation of protons D. Krebs' cycle List II (Location) I. Inner mitochondrial membrane II. Mitochondrial matrix III. Cytoplasm IV. Intermembrane space Choose the correct answer from the options given below:
- a)(1) A-IV, B-II, C-I, D-III
- b)(2) A-I, B-IV, C-III, D-II
- c)(3) A-III, B-II, C-IV, D-I
- d)(4) A-III, B-I, C-IV, D-II
- Q85.
How many \ce{ATP} and \ce{NADPH} molecules are required to make one molecule of \ce{glucose} through the Calvin pathway?
- a)(1) 18 \ce{ATP} and 12 \ce{NADPH}
- b)(2) 6 \ce{ATP} and 12 \ce{NADPH}
- c)(3) 24 \ce{ATP} and 18 \ce{NADPH}
- d)(4) 12 \ce{ATP} and 18 \ce{NADPH}
- Q86.
Match List I with List II : List I A. Genetically modified organism B. Thermostable DNA polymerase C. Ti plasmid D. pBR322 List II I. Agrobacterium tumefaciens II. Bt cotton III. Thermus aquaticus IV. Escherichia coli Choose the correct answer from the options given below:
- a)(1) A-II, B-III, C-I, D-IV
- b)(2) A-I, B-IV, C-III, D-II
- c)(3) A-I, B-II, C-IV, D-III
- d)(4) A-II, B-I, C-IV, D-III
- Q87.
In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?
- a)(1) Funaria
- b)(2) Pinus
- c)(3) Selaginella
- d)(4) Wolffia
- Q88.Plant physiology
Photorespiration reaction catalyzed by \(\text{RuBisCO}\) is shown below: \(\text{RuBP} + \text{O}_2 \rightarrow \text{3-Phosphoglycerate} + \text{X}\) Identify '\(\text{X}\)' from the given options:
- a)Phosphoenolpyruvate
- b)2-Phosphoglycolate
- c)Oxaloacetate
- d)Malate
- Q89.Animal diseases
Mad cow disease is caused by
- a)prions
- b)viroids
- c)\textit{Aspergillus} sp.
- d)\textit{Mycoplasma} sp.
- Q90.Photosynthesis
Which pigment has absorption peak at \(\text{700 nm}\) in the photosynthetic reaction centre \(\text{PS I (P700)}\)?
- a)Chlorophyll \(\text{a}\)
- b)Chlorophyll \(\text{b}\)
- c)Xanthophylls
- d)Carotenoids
- Q91.Animal respiration
In water, frogs respire using
- a)skin
- b)buccal cavity
- c)lungs
- d)trachea
- Q92.Human anatomy
Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans ?
- a)Femur-tibia-patella-tarsal
- b)Patella-femur-tibia-tarsal
- c)Femur-patella-tibia-tarsal
- d)Femur-tarsal-patella-tibia
- Q93.Plant morphology
Phyllotaxy is the pattern of arrangement of
- a)leaves
- b)flowers
- c)fruits
- d)sepals
- Q94.Biomolecules and functions
Match List-I with List-II. \(\text{List-I}\) A. Starch B. Antibody C. Concanavalin A D. Glut-4 \(\text{List-II}\) I. Fights infection II. Energy storage III. Glucose transport IV. Lectin Choose the \(\text{correct}\) answer from the options given below:
- a)A-I, B-II, C-IV, D-III
- b)A-II, B-I, C-IV, D-III
- c)A-II, B-I, C-III, D-IV
- d)A-I, B-II, C-III, D-IV
- Q95.Animal classification
Given below are two statements: \(\text{Statement I}\) : When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. \(\text{Statement II}\) : In Echinodermata, both adults and larvae are radially symmetrical. In the light of the above statements, choose the \(\text{most appropriate}\) answer from the options given below:
- a)Both \(\text{Statement I}\) and \(\text{Statement II}\) are correct
- b)Both \(\text{Statement I}\) and \(\text{Statement II}\) are incorrect
- c)\(\text{Statement I}\) is correct but \(\text{Statement II}\) is incorrect
- d)\(\text{Statement I}\) is incorrect but \(\text{Statement II}\) is correct
- Q96.Cell Biology
Endomembrane system includes
- a)endoplasmic reticulum, Golgi complex, lysosome and vacuole
- b)mitochondria, chloroplast, peroxisomes and vacuole
- c)mitochondria, chloroplast, peroxisomes, lysosome and vacuole
- d)endoplasmic reticulum, chloroplast, peroxisomes and vacuole
- Q97.Cellular Respiration
How many molecules of pyruvic acid are produced at the end of glycolysis from \(\text{206}\) molecules of glucose ?
- a)\(\text{206}\)
- b)\(\text{309}\)
- c)\(\text{103}\)
- d)\(\text{412}\)
- Q98.Plant Growth Regulators
Which of the following plant growth regulators is used as herbicide ?
- a)\(\text{2,4-D}\)
- b)Kinetin
- c)Abscisic acid
- d)Gibberellin
- Q99.Plant Kingdom
Given below are two statements: \(\text{Statement I}\) : In gymnosperms, the male and female gametophytes remain within the sporangia. \(\text{Statement II}\) : In gymnosperms, seeds are not covered. In the light of the above statements, choose the \(\text{most appropriate}\) answer from the options given below:
- a)Both \(\text{Statement I}\) and \(\text{Statement II}\) are correct
- b)Both \(\text{Statement I}\) and \(\text{Statement II}\) are incorrect
- c)\(\text{Statement I}\) is correct but \(\text{Statement II}\) is incorrect
- d)\(\text{Statement I}\) is incorrect but \(\text{Statement II}\) is correct
- Q100.Microbiology
Match List-I with List-II. \(\text{List-I}\) A. Rod B. Spherical C. Comma D. Spirillum \(\text{List-II}\) I. Cocci II. Vibrio III. Bacilli IV. Spirilla Choose the \(\text{correct}\) answer from the options given below:
- a)A-I, B-II, C-IV, D-III
- b)A-III, B-I, C-II, D-IV
- c)A-II, B-III, C-I, D-IV
- d)A-II, B-IV, C-I, D-III
- Q101.Plant Morphology
Which of the following are characteristic features of Solanaceae family ? (a) Flowers are actinomorphic and bisexual (b) Calyx have five sepals and are united (c) Androecium have five stamens and are epipetalous (d) Ovary is inferior Choose the \(\text{correct}\) answer from the options given below:
- a)(a), (b) and (c) only
- b)(a) and (d) only
- c)(b), (c) and (d) only
- d)(a), (b), (c) and (d)
- Q102.Photosynthesis
Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.
- a)Absorption spectra of chlorophyll \(\text{a}\) and \(\text{b} \rightarrow\) production of glucose \(\rightarrow\) release of oxygen \(\rightarrow\) role of air
- b)Role of air \(\rightarrow\) release of oxygen \(\rightarrow\) production of glucose \(\rightarrow\) absorption spectra of chlorophyll \(\text{a}\) and \(\text{b}\)
- c)Release of oxygen \(\rightarrow\) production of glucose \(\rightarrow\) absorption spectra of chlorophyll \(\text{a}\) and \(\text{b} \rightarrow\) role of air
- d)Production of glucose \(\rightarrow\) release of oxygen \(\rightarrow\) absorption spectra of chlorophyll \(\text{a}\) and \(\text{b} \rightarrow\) role of air
- Q103.Human Physiology
The number of action potentials generated by sino-arterial node (\(\text{SAN}\)) in a healthy human is \(\text{per minute}\).
- a)\(\text{28 - 30}\)
- b)\(\text{70 - 75}\)
- c)\(\text{100 - 110}\)
- d)\(\text{120 - 140}\)
- Q104.Plant Physiology
How many turns of Calvin cycle are required for the formation of three molecules of glucose ?
- a)\(\text{6}\)
- b)\(\text{3}\)
- c)\(\text{1}\)
- d)\(\text{18}\)
- Q105.Human Physiology
Which of the following statements is **incorrect** ?
- a)Blood coagulates in response to an injury
- b)Blood clot consists of fibrins
- c)Fibrin is produced from fibrinogen
- d)Fibrinogen is produced from thrombin
- Q106.Biological Classification
Match List-I with List-II. **List-I** A. Family B. Genus C. Class D. Order E. Phylum **List-II** I. Sapindales II. Dicotyledonae III. Anacardiaceae IV. *Mangifera* V. Angiospermae Choose the **correct** answer from the options given below:
- a)A-I, B-II, C-III, D-IV, E-V
- b)A-II, B-I, C-II, D-IV, E-III
- c)A-III, B-IV, C-II, D-I, E-V
- d)A-IV, B-III, C-II, D-I, E-V
- Q107.Biological Classification
Arrange the following taxonomic categories in ascending order. (a) Genus (b) Class (c) Order (d) Phylum (e) Family (f) Kingdom (g) Species Choose the **correct** answer from the options given below:
- a)(g), (a), (e), (c), (b), (d), (f)
- b)(a), (g), (e), (b), (c), (d), (f)
- c)(g), (a), (e), (c), (b), (f), (d)
- d)(a), (g), (e), (c), (b), (f), (d)
- Q108.Plant Morphology
Match List-I with List-II. **List-I** A. Marginal placentation B. Axile placentation C. Parietal placentation D. Free central placentation **List-II** I. *Argemone* II. Tomato III. Primrose IV. Pea Choose the **correct** answer from the options given below:
- a)A-I, B-II, C-III, D-IV
- b)A-IV, B-II, C-I, D-III
- c)A-IV, B-III, C-II, D-I
- d)A-IV, B-I, C-II, D-III
- Q109.Plant Classification
*Sphenopsida* class belongs to
- a)bryophytes
- b)angiosperms
- c)gymnosperms
- d)pteridophytes
- Q110.Plant Physiology
Which of the following statements regarding photorespiration are correct ? (a) It occurs in \( ext{C}_{3}\) plants (b) \( ext{CO}_{2}\) is consumed and \( ext{O}_{2}\) is generated (c) Phosphoglycolate is formed (d) No synthesis of ATP and NADPH Choose the **correct** answer from the options given below:
- a)(a) and (d) only
- b)(a), (c) and (d) only
- c)(b) and (d) only
- d)(a) and (b) only
- Q111.Cell Biology
Smooth endoplasmic reticulum
- a)has ribosomes attached to its surface
- b)is the major site for the synthesis of lipids
- c)is actively involved in protein synthesis
- d)is a site for the synthesis of carbohydrates
- Q112.Human Physiology
Which one of the following statements is **incorrect** ?
- a)\(\alpha\)-cells of pancreas secrete glucagon
- b)\(\alpha\)-cells of pancreas secrete insulin
- c)Glucagon stimulates glycogenolysis
- d)\(eta\)-cells of pancreas secrete insulin
- Q113.Biological Classification
Genus represents
- a)an individual plant or animal
- b)a population of plants and animals
- c)a group of closely related species
- d)a group of closely related families
- Q114.Cell Biology
Which of the following is not a prokaryote ?
- a)Bacteria
- b)Blue green algae
- c)Mycoplasma
- d)Fungi
- Q115.Plant Physiology
Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage ?
- a)Abscisic acid
- b)Gibberellin
- c)Indole butyric acid
- d)Ethephon
- Q116.Cell Biology
The correct sequence of adult cell cycle phases is
- a)G1-G2-S-M
- b)G1-S-G2-M
- c)G1-M-G2-S
- d)S-M-G2-G1
- Q117.Reproductive Biology
Match List-I with List-II **List-I** A. Fusion of protoplasms B. Fusion of two nuclei C. Generation of haploid D. Karyogamy **List-II** I. Meiosis II. Plasmogamy III. Karyogamy spores Choose the **correct** answer from the options given below:
- a)A-II, B-III, C-I
- b)A-II, B-I, C-III
- c)A-I, B-II, C-III
- d)A-III, B-II, C-I
- Q118.Animal Kingdom
Given below are two statements: **Statement I**: The class name Reptilia refers to creeping or crawling mode of locomotion. **Statement II**: All organisms belonging to Reptilia have three chambered heart. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both Statement I and Statement II are correct
- b)Both Statement I and Statement II are incorrect
- c)Statement I is correct but Statement II is incorrect
- d)Statement I is incorrect but Statement II is correct
- Q119.Cell Biology
Given below are two statements: **Statement I**: Chromosomes are fully condensed at the end of prophase I. **Statement II**: Meiosis I resembles mitosis. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both Statement I and Statement II are true
- b)Both Statement I and Statement II are false
- c)Statement I is correct, but Statement II is false
- d)Statement I is incorrect, but Statement II is true
- Q120.Animal Kingdom
Which of the following is **not** a characteristic of chordates ?
- a)Presence of notochord
- b)Central nervous system is dorsal
- c)Presence of gills
- d)Absence of post anal part (tail)
- Q121.Arithmetic Progression
Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day ?
- a)50 cm
- b)230 cm
- c)170 cm
- d)460 cm
- Q122.Human Physiology
Arrange the following elements in descending order of their contribution to percentage weight of the human body: (a) Oxygen (b) Carbon (c) Hydrogen (d) Nitrogen Choose the **correct** answer from the options given below:
- a)(a), (b), (c), (d)
- b)(a), (b), (d), (c)
- c)(b), (a), (c), (d)
- d)(b), (a), (d), (c)
- Q123.Animal Anatomy
In frogs, the number of pairs of cranial nerves arising from the brain are
- a)6
- b)12
- c)10
- d)9
- Q124.Human Reproduction
The covering of ovum at ovulation is
- a)endometrium
- b)zona radiata
- c)zona pellucida
- d)chorion
- Q125.Ecological Interactions
Match List-I with List-II. List-I A. Both species are harmed B. One species is harmed and the other is benefited C. Both benefited D. One is benefited while the other has no effect List-II I. Predation II. Mutualism III. Competition IV. Commensalism Choose the correct answer from the options given below:
- a)A-II, B-III, C-I, D-IV
- b)A-I, B-II, C-IV, D-III
- c)A-III, B-I, C-II, D-IV
- d)A-IV, B-I, C-III, D-II
- Q126.Mendelian Genetics
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf. Reason R: Stem height is a contrasting trait, with tall being dominant and dwarf being recessive. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both A and R are correct and R is the correct explanation of A
- b)Both A and R are correct but R is not the correct explanation of A
- c)A is correct but R is not correct
- d)A is not correct but R is correct
- Q127.Recombinant DNA Technology
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In recombinant DNA technology lysozyme is used for disrupting bacterial cells while cellulase is for plant cells. Reason R: Isolation of genetic material needs disruption of cells. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both A and R are correct and R is the correct explanation of A
- b)Both A and R are correct but R is not the correct explanation of A
- c)A is correct but R is not correct
- d)A is not correct but R is correct
- Q128.Medicinal Chemistry
Which of the following is used as an effective sedative and painkiller for treating post-surgery patients ?
- a)Interferon
- b)Antibiotics
- c)Morphine
- d)Anti-retroviral drugs
- Q129.Ecosystem Energy
Which of the following statements are correct ? (a) Energy flow from producers to consumers is unidirectional (b) Energy pyramid can never be inverted (c) Transfer of energy follows the \(1\%\) law Choose the correct answer from the options given below:
- a)(a), (b) and (c)
- b)(a) and (b) only
- c)(a) and (c) only
- d)(b) and (c) only
- Q130.Parasitic Diseases
Which of the following statements is correct about \ce{Plasmodium} ?
- a)Reproduces sexually in liver cells
- b)Reproduces sexually in RBCs
- c)Gametocytes develop in mosquito gut
- d)Fertilization takes place in mosquito gut
- Q131.Molecular Biology
Match List-I with List-II. List-I A. Transformation B. Cloning site C. Selection D. Ori List-II I. Restriction enzyme II. Transfer DNA to host bacteria III. Replication IV. Antibiotic Choose the correct answer from the options given below:
- a)A-II, B-I, C-IV, D-III
- b)A-I, B-II, C-IV, D-III
- c)A-III, B-II, C-I, D-I
- d)A-IV, B-I, C-III, D-II
- Q132.Biological Associations
Symbiotic association between fungi and algae are called
- a)lichens
- b)sponges
- c)mycorrhiza
- d)chrysophytes
- Q133.Cell Biology
Cell theory was formulated by
- a)Schleiden and Schwann
- b)Robert Brown
- c)Singer and Nicolson
- d)Antonie Von Leeuwenhoek
- Q134.Cell Biology
Which of the following are characteristics of prokaryotic cells ? (a) Ribosomes are made of 50S and 30S subunits (b) They can have plasmids (c) They contain mesosome (d) They have peroxisomes Choose the correct answer from the options given below:
- a)(a) and (c) only
- b)(a), (b) and (c) only
- c)(a), (c) and (d) only
- d)(a), (b) and (c) and (d)
- Q135.Cell Organelles
Mitochondrial inner membrane encloses
- a)matrix
- b)cytosol
- c)mucus
- d)aqueous humor
- Q136.Cell Components
Match List-I with List-II List-I A. Cristae B. Cisternae C. Thylakoids D. Phospholipid List-II I. Flat membrane sacs in stroma of chloroplast II. Mitochondria III. Cell membrane IV. Disc shaped sacs in the Golgi apparatus Choose the correct answer from the options given below:
- a)A-II, B-IV, C-I, D-III
- b)A-II, B-III, C-I, D-IV
- c)A-II, B-IV, C-III, D-I
- d)A-IV, B-III, C-I, D-II
- Q137.Cell Organelles
The plastid that stores xanthophyll is known as
- a)chloroplast
- b)chromoplast
- c)aleuroplast
- d)amyloplast
- Q138.Human Endocrine System
Which of the following statements related to pituitary gland are \(\text{correct}\) ? (a) It is divided anatomically into adenohypophysis and neurohypophysis (b) It secretes follicle stimulating hormone (c) It secretes melanocyte stimulating hormone (d) It does not secrete prolactin Choose the \(\text{correct}\) answer from the options given below:
- a)(a) and (b) only
- b)(a) and (c) only
- c)(c) and (d) only
- d)(b) and (d) only
- Q139.Ecosystem Ecology
Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below:
- a)(1) Both statement I and statement II are correct
- b)(2) Both statement I and statement II are incorrect
- c)(3) Statement I is correct but statement II is incorrect
- d)(4) Statement I is incorrect but statement II is correct
- Q140.Human Diseases
Match List-I with List-II. List-I A. Emphysema B. Angina Pectoris C. Glomerulo-nephritis D. Tetany List-II I. Rapid spasms in muscle due to low \( ext{Ca}^{++}\) in body fluid II. Damaged alveolar walls and decreased respiratory surface III. Acute chest pain when not enough oxygen is reaching to heart muscle IV. Inflammation of glomeruli of kidney Choose the correct answer from the options given below:
- a)(1) A-III, B-I, C-IV, D-II
- b)(2) A-III, B-I, C-II, D-IV
- c)(3) A-II, B-IV, C-III, D-I
- d)(4) A-II, B-III, C-IV, D-I
- Q141.Plant Reproduction
Given below are two statement: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R): The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below:
- a)(1) Both A and R are true and R is the correct explanation of A.
- b)(2) Both A and R are true but R is NOT the correct explanation of A.
- c)(3) A is true but R is false.
- d)(4) A is false but R is true.
- Q142.Biotechnology
Which of the following is an example of non— distilled alcoholic beverage produced by yeast?
- a)(1) Whisky
- b)(2) Brandy
- c)(3) Beer
- d)(4) Rum
- Q143.Plant Morphology
Given below are two statements: Statement I: In a floral formula \(\oplus\) stands for zygomorphic nature of the flower, and \(\underline{\text{G}}\) stands for inferior ovary. Statement II: In a floral formula \(\oplus\) stands for actinomorphic nature of the flower and \(\overline{\text{G}}\) stands for superior ovary. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)(1) Both statement I and statement II are correct
- b)(2) Both statement I and statement II are incorrect
- c)(3) Statement I is correct but statement II is incorrect
- d)(4) Statement I is incorrect but statement II is correct
- Q144.Biotechnology applications
Streptokinase produced by bacterium \textit{Streptococcus} is used for
- a)(1) Curd production
- b)(2) Ethanol production
- c)(3) Liver disease treatment
- d)(4) Removing clots from blood vessels
- Q145.Human Genetics
Which chromosome in the human genome has the highest number of genes?
- a)(1) Chromosome X
- b)(2) Chromosome Y
- c)(3) Chromosome 1
- d)(4) Chromosome 10
- Q146.Animal Morphology
Which of the following statement is correct about location of the male frog copulatory pad?
- a)(1) First and Second digit of fore limb
- b)(2) First digit of hind limb
- c)(3) Second digit of fore limb
- d)(4) First digit of the fore limb
- Q147.Plant Hormones
Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
- a)(1) Ethylene
- b)(2) Abscisic acid
- c)(3) Gibberellin
- d)(4) Cytokinin
- Q148.Animal Kingdom Classification
While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?
- a)(1) Acoelomate
- b)(2) Pseudocoelomate
- c)(3) Schizocoelomate
- d)(4) Spongocoelomate
- Q149.Human Reproduction
Match List-I with List-II. List-I List-II A. Head I. Enzymes B. Middle piece II. Sperm motility C. Acrosome III. Energy D. Tail IV. Genetic material Choose the correct answer from the options given below:
- a)(1) A-IV, B-III, C-I, D-II
- b)(2) A-IV, B-III, C-II, D-I
- c)(3) A-III, B-IV, C-II, D-I
- d)(4) A-III, B-II, C-I, D-IV
- Q150.Plant Life Cycles
Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte. E. Transfer of antherozoids to the archegonia in presence of water. Choose the correct answer from the options given below:
- a)(1) B, A, D, E, C
- b)(2) B, A, E, C, D
- c)(3) D, E, C, A, B
- d)(4) E, D, C, B, A
- Q151.Human Physiology
Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones Choose the correct answer from the options given below:
- a)(1) A, B and C Only.
- b)(2) A, B, C and D
- c)(3) A, C and D Only
- d)(4) A, B and D Only
- Q152.Microbiology
Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer from the options given below:
- a)(1) A only
- b)(2) D only
- c)(3) B only
- d)(4) E only
- Q153.Molecular Biology
Given below are two statements: Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both statement I and statement II are correct
- b)Both statement I and statement II are incorrect
- c)Statement I is correct but statement II is incorrect
- d)Statement I is incorrect but statement II is correct
- Q154.Genetic Engineering
In the above represented plasmid an alien piece of DNA is inserted at EcoRI site. Which of the following strategies will be chosen to select the recombinant colonies?
- a)Using ampicillin & tetracyclin containing medium plate.
- b)Blue color colonies will be selected.
- c)White color colonies will be selected.
- d)Blue color colonies grown on ampicillin plates can be selected.
- Q155.Biotechnology
Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
- a)Bacterium
- b)Yeast
- c)Virus
- d)Phage
- Q156.Biochemistry
Name the class of enzyme that usually catalyze the following reaction: \(S - G + S^\# \rightarrow S + S^\# - G\) Where, G \(\rightarrow\) a group other than hydrogen S \(\rightarrow\) a substrate \(S^\# \rightarrow\) another substrate
- a)Hydrolase
- b)Lyase
- c)Transferase
- d)Ligase
- Q157.Plant Anatomy
Find the statement that is NOT correct with regard to the structure of monocot stem.
- a)Hypodermis is parenchymatous.
- b)Vascular bundles are scattered.
- c)Vascular bundles are conjoint and closed.
- d)Phloem parenchyma is absent.
- Q158.Plant Life Cycles
The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of sporophyte. E. Release of antherozoids into water. Choose the correct answer from the option given below:
- a)D, E, A, C, B
- b)B, E, A, C, D
- c)B, E, A, D, C
- d)D, E, A, B, C
- Q159.Human Health Disease
Which are correct: A. Computed tomography and magnetic resonance imaging detect cancers of internal organs. B. Chemotherapeutics drugs are used to kill non-cancerous cells. C. \(\alpha\)-interferon activate the cancer patients' immune system and helps in destroying the tumour. D. Chemotherapeutic drugs are biological response modifiers. E. In the case of leukaemia blood cells counts are decreased. Choose the correct answer from the option given below:
- a)B and D only
- b)D and E only
- c)C and D only
- d)A and C only
- Q160.Cell Biology
Match List-I with List-II. List-I List-II A. Centromere I. Mitochondrion B. Cilium II. Cell division C. Cristae III. Cell movement D. Cell membrane IV. Phospholipid Bilayer Choose the correct answer from the options given below:
- a)(1) A-I, B-II, C-III, D-IV
- b)(2) A-II, B-I, C-IV, D-III
- c)(3) A-IV, B-II, C-III, D-I
- d)(4) A-II, B-III, C-I, D-IV
- Q161.Plant Physiology
Match List-I with List-II. List-I A. Chlorophyll a B. Chlorophyll b C. Xanthophylls D. Carotenoids List-II I. Yellow-green II. Yellow III. Blue-green IV. Yellow to Yellow-orange Choose the option with all correct matches.
- a)A-III, B-IV, C-II, D-I
- b)A-III, B-II, C-I, D-IV
- c)A-I, B-II, C-IV, D-III
- d)A-I, B-IV, C-III, D-II
- Q162.Plant Morphology
In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:
- a)Coleoptile
- b)Coleorhiza
- c)Integument
- d)Aleurone layer
- Q163.Biotechnology Principles
Identify the part of a bio-reactor which is used as a foam braker from the given figure.
- a)A
- b)B
- c)D
- d)C
- Q164.Plant Reproduction
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R): The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below:
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is NOT the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- Q165.Cell Biology
A specialized membranous structure in a prokaryotic cell which helps in cell wall formation, DNA replication and respiration is:
- a)Mesosome
- b)Chromatophores
- c)Cristae
- d)Endoplasmic Reticulum
- Q166.Molecular Biology
Which one of the following are the post-transcriptional events in an eukaryotic cell? A. Transport of pre-mRNA to cytoplasm prior to splicing. B. Removal of introns and joining of exons. C. Addition of methyl group at 5' end of hnRNA. D. Addition of adenine residues at 3' end of hnRNA. E. Base pairing of two complementary RNAs. Choose the correct answer from the options given below:
- a)A, B, C only
- b)B, C, D only
- c)B, C, E only
- d)C, D, E only
- Q167.Genetics
What is the pattern of inheritance for polygenic trait?
- a)Mendelian inheritance pattern
- b)Non-mendelian inheritance pattern
- c)Autosomal dominant pattern
- d)X-linked recessive inheritance pattern
- Q168.Biochemistry
Which one of the following enzymes contains ‘Haem’ as the prosthetic group?
- a)RuBisCo
- b)Carbonic anhydrase
- c)Succinate dehydrogenase
- d)Catalase
- Q169.Biological Classification
Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization. A. Multicellular heterotrophs with cell wall made of chitin. B. Heterotrophs with tissue/organ/organ system level of body organization. C. Prokaryotes with cell wall made of polysaccharides and amino acids. D. Eukaryotic autotrophs with tissue/organ level of body organization. E. Eukaryotes with cellular body organization. Choose the correct answer from the options given below:
- a)A, C, E, B, D
- b)C, E, A, D, B
- c)A, C, E, D, B
- d)C, E, A, B, D
- Q170.Ecology
Who is known as the father of Ecology in India?
- a)S. R. Kashyap
- b)Ramdeo Misra
- c)Ram Udar
- d)Birbal Sahni
- Q171.Genetics Molecular Biology
Match List-I with List-II. **List-I** A. Alfred Hershey and Martha Chase B. Euchromatin C. Frederick Griffith D. Heterochromatin **List-II** I. Streptococcus Pneumoniae II. Densely packed and dark-stained III. Loosely packed and light-stained IV. DNA as genetic material confirmation Choose the correct answer from the options given below:
- a)A-II, B-IV, C-I, D-III
- b)A-IV, B-II, C-I, D-III
- c)A-IV, B-III, C-I, D-II
- d)A-III, B-II, C-IV, D-I
- Q172.Cell Biology
Neoplastic characteristics of cells refers to: A. A mass of proliferating cell B. Rapid growth of cells C. Invasion and damage to the surrounding tissue D. Those confined to original location Choose the correct answer from the options given below:
- a)A, B only
- b)A, B, C only
- c)A, B, D only
- d)B, C, D only
- Q173.Plant reproduction
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R): Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both A and R are true and R is the correct explanation of A
- b)Both A and R are true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
- Q174.Plant reproduction
How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
- a)2 Meiosis and 3 Mitosis
- b)1 Meiosis and 2 Mitosis
- c)1 Meiosis and 3 Mitosis
- d)No Meiosis and 2 Mitosis
- Q175.Plant morphology
Which of the following is an example of a zygomorphic flower?
- a)Petunia
- b)Datura
- c)Pea
- d)Chilli
- Q176.Plant-animal interaction
Given below are two statements: Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both statement I and statement II are correct
- b)Both statement I and statement II are incorrect
- c)Statement I is correct but statement II is incorrect
- d)Statement I is incorrect but statement II is correct
- Q177.Plant kingdom
Which one of the following is the characteristic feature of gymnosperms?
- a)Seeds are enclosed in fruits.
- b)Seeds are naked.
- c)Seeds are absent.
- d)Gymnosperms have flowers for reproduction.
- Q178.Plant kingdom
Match List-I with List-II. List-I A. Pteridophyte B. Bryophyte C. Angiosperm D. Gymnosperm List-II I. Salvia II. Ginkgo III. Polytrichum IV. Salvinia Choose the option with all correct matches.
- a)A-III, B-IV, C-II, D-I
- b)A-IV, B-III, C-I, D-II
- c)A-III, B-IV, C-I, D-II
- d)A-IV, B-III, C-II, D-I
- Q179.Plant Kingdom
In bryophytes, the gemmae help in which one of the following?
- a)Sexual reproduction
- b)Asexual reproduction
- c)Nutrient absorption
- d)Gaseous exchange
- Q180.Ecosystem Dynamics
Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from \(2^{nd}\) law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both Statement I and Statement II are correct
- b)Both Statement I and Statement II are incorrect
- c)Statement I is correct but Statement II is incorrect
- d)Statement I is incorrect but Statement II is correct
- Q181.Cell Respiration
The complex II of mitochondrial electron transport chain is also known as
- a)Cytochrome \(\ce{bc_1}\)
- b)Succinate dehydrogenase
- c)Cytochrome \(\ce{c}\) oxidase
- d)NADH dehydrogenase
- Q182.Molecular Biology
Polymerase chain reaction (PCR) amplifies DNA following the equation.
- a)\(N^2\)
- b)\(2^n\)
- c)\(2n + 1\)
- d)\(2N^2\)
- Q183.Assisted Reproductive Technology
What are the potential drawbacks in adoption of the IVF method? A. High fatality risk to mother B. Expensive instruments and reagents C. Husband/wife necessary for being donors D. Less adoption of orphans E. Not available in India F. Possibility that the early embryo does not survive Choose the correct answer from the options given below:
- a)B, D, F only.
- b)A, C, D, F only
- c)A, B, C, D only
- d)A, B, C, E, F only
- Q184.Animal Physiology
What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
- a)Aorta
- b)Pulmonary artery
- c)Pulmonary vein
- d)Vena cava
- Q185.Biological Approaches
Which one of the following statements refers to Reductionist Biology?
- a)Physico-chemical approach to study and understand living organisms.
- b)Physiological approach to study and understand, living organisms.
- c)Chemical approach to study and understand living organisms.
- d)Behavioural approach to study and understand living organisms.
- Q186.Molecular Genetics
Given below are two statements: Statement I: In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactions in living systems. Being reactive, RNA is unstable. Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolving repairing mechanism. In the light of the above statements, choose the most appropriate answer from the options given below:
- a)Both statement I and statement II are correct
- b)Both statement I and statement II are incorrect
- c)Statement I is correct but statement II is incorrect
- d)Statement I is incorrect but statement II is correct
- Q187.Ecological Interactions
Epiphytes that are growing on a mango branch is an example of which of the following?
- a)Commensalism
- b)Mutualism
- c)Predation
- d)Amensalism
- Q188.Cell Biology
From the statements given below choose the correct option: A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S. D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S. E. The two sub-units of 80S ribosome are 60S and 30S and that of 70S are 50S and 30S
- a)A, B, C are true
- b)A, B, D are true
- c)A, B, E are true
- d)B, D, E are true
- Q189.Biodiversity Conservation
Which one of the following is an example of ex-situ conservation?
- a)National Park
- b)Wildlife Sanctuary
- c)Zoos and botanical gardens
- d)Protected areas.
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