BIOLOGY -PAGE 3
1. Phenotype of an organism is the result of :
1) mutations and linkages 2) cytoplasmic effects and nutrition
3) environmental changes and sexual dimorphism 4) genotype and environment interactions
Ans: 4
2. Photochemical smog pollution does not contain :
1) ozone 2) nitrogen dioxide 3) carbon dioxide
4) PAN (Peroxy Acyl Nitrate)
Ans: 3
3. Moss peat is used as a packing material for sending flowers and live plants to distant places because :
1) it is easily available 2) it is hygroscopic 3) it reduces transpiration 4) it serves as a disinfectant
Ans: 2
4. A common structural feature of vessel elements and sieve tube elements is :
1) thick secondary walls 2) pores on lateral walls 3) presence of P-protein 4) enucleate condition
Ans: 2
5. The thalloid body of a slime mould (Myxomycetes) is known as :
1) protonema 2) Plasmodium 3) fruiting body 4) mycelium
Ans: 2
6. In which mode of inheritance do you expect more maternal influence among the off spring ?
1) Autosomal 2) Cytoplasmic 3) Y-linked 4) X-linked
Ans: 2
7. What type of placentation is seen in sweet pea ?
1) Basal 2) Axile 3) Free central 4) Marginal
Ans: 4
8. Long filamentous threads protruding at the end of a young cob of maize are :
1) anthers 2) styles 3) ovaries 4) hairs
Ans: 2
9. Conifers differ from grasses in the :
1) production of seeds from ovules
2) lack of xylem tracheids
3) absence of pollen tubes
4) formation of endosperm before fertilization
Ans: 4
10. How many different kinds of gametes will be produced by a plant having the genotype AABbCC ?
1) Three 2) Four 3) Nine 4) Two
Ans: 4
11. In maize, hybrid vigour is exploited by :
1) bombarding the protoplast with DNA
2) crossing of two inbreed parental lines
3) harvesting seeds from the most productive plants
4) inducing mutations
Ans: 2
12. Which of the following statements regarding mitochondrial membrane is not correct ?
1) The outer membrane is permeable to all kinds of molecules
2) The enzymes of the electron transfer chain are embedded in the outer membrane
3) The inner membrane is highly convoluted forming a series of infoldings
4) The outer membrane resembles a sieve
Ans: 2
13. Amino acid sequence, in protein synthesis is decided by the sequence of :
1) t-RNA 2) m-RNA 3) c-DNA 4) r-RNA
Ans: 2
14. How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?
1) Two 2) Thirty 3) Fifty seven 4) One
Ans: 2
15. An organic substance bound to an enzyme and essential for its activity is called :
1) coenzyme 2) holoenzyme 3) apoenzyme 4) isoenzyme
Ans: 1
16. Bowman's glands are found in :
1) olfactory epithelium 2) external auditory canal 3) cortical nephrons only 4) juxtamedullary nephrons
Ans: 1
17. The bacterium (Clostridium botulinum) that causes botulism is :
1) a facultative anaerobe 2) an obligate anaerobe 3) a facultative aerobe 4) an obligate aerobe
Ans: 2
18. Which one of the following is the correctly matched pair of an endangered animal and a National Park ?
1) Lion — Corbett National Park
2) Rhinoceros — Kaziranga National Park
3) Wild ass — Dudhwa National Park
4) Great Indian bustard — Keoladeo National Park
Ans: 2
19. A person showing upredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from :
1) schizophrenia 2) borderline personality disorder (BPD) 3) mood disorders 4) addictive disorders
Ans: 1
20. Sulphur is an important nutrient for optimum growth and productivity in :
1) pulse crops 2) cereals 3) fibre crops 4) oilseed crops
Ans: 1
21. Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of : 1) Asteraceae 2) Brassicaceae 3) Solanaceae 4) Liliaceae
Ans: 3
22. In a moss the sporophyte :
1) is partially parasitic on the gametophyte
2) produces gametes that give rise to the gametophyte
3) arises from a spore produced from the gametophyte
4) manufactures food for itself, as well as for the gametophyte
Ans: 1
23. Curing of tea leaves is brought about by the activity of :
1) bacteria 2) mycorrhiza 3) viruses 4) fungi
Ans: 1
24. People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude :
1) people get pollution-free air to breathe and more oxygen is available
2) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
3) there is more UV radiation which enhances RBC production
4) people eat more nutritive food, therefore more RBCs are formed
Ans: 2
25. An important evidence in favour of organic evolution is the occurrence of :
1) homologous and vestigial organs 2) analogous and vestigial organs 3) homologous organs only 4) homologous and analogous organs
Ans: 1
26. Which one of the following is not a living fossil ?
1) King crab 2) Sphenodon 3) Archaeopteryx 4) Peripatus
Ans: 3
27. Annual migration does not occur in the case of :
1) salmon 2) Siberian crane 3) salamander 4) arctic tern
Ans: 3
28. A major breakthrough in the studies of cells came with the development of electron microscope. This is because :
1) the resolution power of the electron microscope is much higher than that of the light microscope
2) the resolving power of the electron microscope is 200 – 350 nm as compared to 0.1 – 0.2 nm for the light microscope
3) electron beam can pass through thick materials, whereas light microscopy requires thin sections 25
4) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
Ans: 1
29. Which one of the following is a matching set of a phylum and its three examples ?
1) Cnidaria — Bonellia, Physalia, Aurelia
2) Platyhelminthes — Planaria, Schistosoma, Enterobius
3) Mollusca — Loligo, Teredo, Octopus
4) Porifera — Spongilla, Euplectella, pennatula
Ans: 3
30. Metameric segmentation is the characteristic of :
1) Platyhelminthes and Arthropoda
2) Echinodermata and Annelida
3) Annelida and Arthropoda
4) Mollusca and Chordata
Ans: 3
31. Which of the following pairs of an animal and a plant represents endangered organisms in India ?
1) Bentinckia nicobarica and red panda
2) Tamarind and rhesus monkey
3) Cinchona and leopard
4) Banyan and black buck
Ans: 1
32. Jurassic period of the Mesozoic era is characterized by :
1) gymnosperms are dominant plants and first birds appear
2) radiation of reptiles and origin of mammal like reptiles
3) dinosaurs become extinct and angiosperms appear
4) flowering plants and first dinosaurs appear
Ans: 1
33. What is common about Trypanosoma, Noctiluca, Monocystis and Giardia ?
1) These are all unicellular protists
2) They have flagella
3) They produce spores
4) These are all parasites
Ans: 1
34. Which of the following statements regarding cilia is not correct ?
1) The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane
2) Cilia are hair-like cellular appendages
3) Microtubules of cilia are composed of tubulin
4) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules
Ans: 3
35. Microbes found to be very useful in genetic engineering are :
1) Escherichia coli and Agrobacterium tumefaciens
2) Vibrio cholerae and a tailed bacteriophage
3) Diplococcus sp. and Pseudomonas sp.
4) Crown gall bacterium and Caenorhabditis elegans
Ans: 1
36. Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread ?
A. Temperature of about 25°C
B. Temperature of about 5°C
C. Relative humidity of about 5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place
Choose the answer from the following options :
1) A, C and E only
2) A, D and E only
3) B, D and E only
4) B, C and F only
Ans: 2
37. Evolutionary history of an organism is known as :
1) Phylogeny 2) Ancestry 3) Paleontology 4) Ontogeny
Ans: 1
38. Which of the following is considered a hot-spot of biodiversity in India ?
1) Western ghats 2) Indo-Gangetic plain 3) Eastern ghats 4) Aravalli hills
Ans: 1
39. During photorespiration, the oxygen consuming reaction(s) occur in :
1) stroma of chloroplasts and mitochondria 2) stroma of chloroplasts and peroxisomes
3) grana of chloroplasts and peroxisomes 4) stroma of chloroplasts
Ans: 2
40. Which one of the following is an example of polygenic inheritance ?
1) Flower colour in Mirabilis jalapa 2) Production of male honey bee 3) Pod shape in garden pea 4) Skin colour in humans
Ans: 4
41. Which one of the following not act as a neurotransmitter ?
1) Acetylcholine 2) Epinephrine 3) Nor epinephrine 4) Cortisone
Ans: 4
42. Sertoli cells are regulated by the pituitary hormone known as :
1) FSH 2) GH 3) Prolactin 4) LH
Ans: 1
43. A steroid hormone which regulates glucose metabolism is :
1) cortisol 2) corticosterone 3) 11-deoxycorticosterone 4) cortisone
Ans: 1
44. The contractile protein of skeletal muscle involving ATPase activity is :
1) tropomyosin 2) myosin 3) α-actinin 4) troponin
Ans: 2
45. Which one of the following is not a second messenger in hormone action ?
1) cGMP 2) Calcium 3) Sodium 4) cAMP
Ans: 3
46. In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F 2 generation of the cross RRYY x rryy ?
1) Only round seeds with green cotyledons
2) Only wrinkled seeds with yellow cotyledons
3) Only wrinkled seeds with green cotyledons
4) Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons
Ans: 4
47. One gene – one enzyme hypothesis was postulated by :
1) R. Franklin 2) Hershey and Chase 3) A. Garrod 4) Beadle and Tatum
Ans: 4
48. One turn of the helix in a B-form DNA is approximately :
1) 20 nm 2) 0.34 nm 3) 3.4 nm 4) 2 nm
Ans: 3
49. Test cross involves :
1) crossing between two genotypes with recessive trait
2) crossing between two F 1 hybrids
3) crossing the F 1 hybrid with a double recessive genotype
4) crossing between two genotypes with dominant trait
Ans: 3
50. Antiparallel strands of a DNA molecule means that :
1) one strand turns anti-clockwise
2) the phosphate groups of two DNA strands, at their ends, share the same position
3) the phosphate groups at the start of two DNA strands are in opposite position (pole)
4) one strand turns clockwise
Ans: 3
1) mutations and linkages 2) cytoplasmic effects and nutrition
3) environmental changes and sexual dimorphism 4) genotype and environment interactions
Ans: 4
2. Photochemical smog pollution does not contain :
1) ozone 2) nitrogen dioxide 3) carbon dioxide
4) PAN (Peroxy Acyl Nitrate)
Ans: 3
3. Moss peat is used as a packing material for sending flowers and live plants to distant places because :
1) it is easily available 2) it is hygroscopic 3) it reduces transpiration 4) it serves as a disinfectant
Ans: 2
4. A common structural feature of vessel elements and sieve tube elements is :
1) thick secondary walls 2) pores on lateral walls 3) presence of P-protein 4) enucleate condition
Ans: 2
5. The thalloid body of a slime mould (Myxomycetes) is known as :
1) protonema 2) Plasmodium 3) fruiting body 4) mycelium
Ans: 2
6. In which mode of inheritance do you expect more maternal influence among the off spring ?
1) Autosomal 2) Cytoplasmic 3) Y-linked 4) X-linked
Ans: 2
7. What type of placentation is seen in sweet pea ?
1) Basal 2) Axile 3) Free central 4) Marginal
Ans: 4
8. Long filamentous threads protruding at the end of a young cob of maize are :
1) anthers 2) styles 3) ovaries 4) hairs
Ans: 2
9. Conifers differ from grasses in the :
1) production of seeds from ovules
2) lack of xylem tracheids
3) absence of pollen tubes
4) formation of endosperm before fertilization
Ans: 4
10. How many different kinds of gametes will be produced by a plant having the genotype AABbCC ?
1) Three 2) Four 3) Nine 4) Two
Ans: 4
11. In maize, hybrid vigour is exploited by :
1) bombarding the protoplast with DNA
2) crossing of two inbreed parental lines
3) harvesting seeds from the most productive plants
4) inducing mutations
Ans: 2
12. Which of the following statements regarding mitochondrial membrane is not correct ?
1) The outer membrane is permeable to all kinds of molecules
2) The enzymes of the electron transfer chain are embedded in the outer membrane
3) The inner membrane is highly convoluted forming a series of infoldings
4) The outer membrane resembles a sieve
Ans: 2
13. Amino acid sequence, in protein synthesis is decided by the sequence of :
1) t-RNA 2) m-RNA 3) c-DNA 4) r-RNA
Ans: 2
14. How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?
1) Two 2) Thirty 3) Fifty seven 4) One
Ans: 2
15. An organic substance bound to an enzyme and essential for its activity is called :
1) coenzyme 2) holoenzyme 3) apoenzyme 4) isoenzyme
Ans: 1
16. Bowman's glands are found in :
1) olfactory epithelium 2) external auditory canal 3) cortical nephrons only 4) juxtamedullary nephrons
Ans: 1
17. The bacterium (Clostridium botulinum) that causes botulism is :
1) a facultative anaerobe 2) an obligate anaerobe 3) a facultative aerobe 4) an obligate aerobe
Ans: 2
18. Which one of the following is the correctly matched pair of an endangered animal and a National Park ?
1) Lion — Corbett National Park
2) Rhinoceros — Kaziranga National Park
3) Wild ass — Dudhwa National Park
4) Great Indian bustard — Keoladeo National Park
Ans: 2
19. A person showing upredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from :
1) schizophrenia 2) borderline personality disorder (BPD) 3) mood disorders 4) addictive disorders
Ans: 1
20. Sulphur is an important nutrient for optimum growth and productivity in :
1) pulse crops 2) cereals 3) fibre crops 4) oilseed crops
Ans: 1
21. Pentamerous, actinomorphic flowers, bicarpillary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of : 1) Asteraceae 2) Brassicaceae 3) Solanaceae 4) Liliaceae
Ans: 3
22. In a moss the sporophyte :
1) is partially parasitic on the gametophyte
2) produces gametes that give rise to the gametophyte
3) arises from a spore produced from the gametophyte
4) manufactures food for itself, as well as for the gametophyte
Ans: 1
23. Curing of tea leaves is brought about by the activity of :
1) bacteria 2) mycorrhiza 3) viruses 4) fungi
Ans: 1
24. People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude :
1) people get pollution-free air to breathe and more oxygen is available
2) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
3) there is more UV radiation which enhances RBC production
4) people eat more nutritive food, therefore more RBCs are formed
Ans: 2
25. An important evidence in favour of organic evolution is the occurrence of :
1) homologous and vestigial organs 2) analogous and vestigial organs 3) homologous organs only 4) homologous and analogous organs
Ans: 1
26. Which one of the following is not a living fossil ?
1) King crab 2) Sphenodon 3) Archaeopteryx 4) Peripatus
Ans: 3
27. Annual migration does not occur in the case of :
1) salmon 2) Siberian crane 3) salamander 4) arctic tern
Ans: 3
28. A major breakthrough in the studies of cells came with the development of electron microscope. This is because :
1) the resolution power of the electron microscope is much higher than that of the light microscope
2) the resolving power of the electron microscope is 200 – 350 nm as compared to 0.1 – 0.2 nm for the light microscope
3) electron beam can pass through thick materials, whereas light microscopy requires thin sections 25
4) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
Ans: 1
29. Which one of the following is a matching set of a phylum and its three examples ?
1) Cnidaria — Bonellia, Physalia, Aurelia
2) Platyhelminthes — Planaria, Schistosoma, Enterobius
3) Mollusca — Loligo, Teredo, Octopus
4) Porifera — Spongilla, Euplectella, pennatula
Ans: 3
30. Metameric segmentation is the characteristic of :
1) Platyhelminthes and Arthropoda
2) Echinodermata and Annelida
3) Annelida and Arthropoda
4) Mollusca and Chordata
Ans: 3
31. Which of the following pairs of an animal and a plant represents endangered organisms in India ?
1) Bentinckia nicobarica and red panda
2) Tamarind and rhesus monkey
3) Cinchona and leopard
4) Banyan and black buck
Ans: 1
32. Jurassic period of the Mesozoic era is characterized by :
1) gymnosperms are dominant plants and first birds appear
2) radiation of reptiles and origin of mammal like reptiles
3) dinosaurs become extinct and angiosperms appear
4) flowering plants and first dinosaurs appear
Ans: 1
33. What is common about Trypanosoma, Noctiluca, Monocystis and Giardia ?
1) These are all unicellular protists
2) They have flagella
3) They produce spores
4) These are all parasites
Ans: 1
34. Which of the following statements regarding cilia is not correct ?
1) The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane
2) Cilia are hair-like cellular appendages
3) Microtubules of cilia are composed of tubulin
4) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules
Ans: 3
35. Microbes found to be very useful in genetic engineering are :
1) Escherichia coli and Agrobacterium tumefaciens
2) Vibrio cholerae and a tailed bacteriophage
3) Diplococcus sp. and Pseudomonas sp.
4) Crown gall bacterium and Caenorhabditis elegans
Ans: 1
36. Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread ?
A. Temperature of about 25°C
B. Temperature of about 5°C
C. Relative humidity of about 5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place
Choose the answer from the following options :
1) A, C and E only
2) A, D and E only
3) B, D and E only
4) B, C and F only
Ans: 2
37. Evolutionary history of an organism is known as :
1) Phylogeny 2) Ancestry 3) Paleontology 4) Ontogeny
Ans: 1
38. Which of the following is considered a hot-spot of biodiversity in India ?
1) Western ghats 2) Indo-Gangetic plain 3) Eastern ghats 4) Aravalli hills
Ans: 1
39. During photorespiration, the oxygen consuming reaction(s) occur in :
1) stroma of chloroplasts and mitochondria 2) stroma of chloroplasts and peroxisomes
3) grana of chloroplasts and peroxisomes 4) stroma of chloroplasts
Ans: 2
40. Which one of the following is an example of polygenic inheritance ?
1) Flower colour in Mirabilis jalapa 2) Production of male honey bee 3) Pod shape in garden pea 4) Skin colour in humans
Ans: 4
41. Which one of the following not act as a neurotransmitter ?
1) Acetylcholine 2) Epinephrine 3) Nor epinephrine 4) Cortisone
Ans: 4
42. Sertoli cells are regulated by the pituitary hormone known as :
1) FSH 2) GH 3) Prolactin 4) LH
Ans: 1
43. A steroid hormone which regulates glucose metabolism is :
1) cortisol 2) corticosterone 3) 11-deoxycorticosterone 4) cortisone
Ans: 1
44. The contractile protein of skeletal muscle involving ATPase activity is :
1) tropomyosin 2) myosin 3) α-actinin 4) troponin
Ans: 2
45. Which one of the following is not a second messenger in hormone action ?
1) cGMP 2) Calcium 3) Sodium 4) cAMP
Ans: 3
46. In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F 2 generation of the cross RRYY x rryy ?
1) Only round seeds with green cotyledons
2) Only wrinkled seeds with yellow cotyledons
3) Only wrinkled seeds with green cotyledons
4) Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons
Ans: 4
47. One gene – one enzyme hypothesis was postulated by :
1) R. Franklin 2) Hershey and Chase 3) A. Garrod 4) Beadle and Tatum
Ans: 4
48. One turn of the helix in a B-form DNA is approximately :
1) 20 nm 2) 0.34 nm 3) 3.4 nm 4) 2 nm
Ans: 3
49. Test cross involves :
1) crossing between two genotypes with recessive trait
2) crossing between two F 1 hybrids
3) crossing the F 1 hybrid with a double recessive genotype
4) crossing between two genotypes with dominant trait
Ans: 3
50. Antiparallel strands of a DNA molecule means that :
1) one strand turns anti-clockwise
2) the phosphate groups of two DNA strands, at their ends, share the same position
3) the phosphate groups at the start of two DNA strands are in opposite position (pole)
4) one strand turns clockwise
Ans: 3
51. Areolar connective tissue joins :
1) fat body with muscles
2) integument with muscles
3) bones with muscles
4) bones with bones
Ans: 2
52. Mast cells secrete :
1) hippurin 2) myoglobin 3) histamine 4) haemoglobin
Ans: 3
53. If a colourblind woman marries a normal visioned man, their sons will be :
1) all normal visioned 2) one-half colourblind and one-half normal
3) three-fourths colourbling and one-fourth normal 4) all colourblind
Ans: 4
54. Cri-du-chat syndrome in humans is caused by the :
1) fertilization of an XX egg by a normal Y-bearing sperm
2) loss of half of the short arm of chromosome 5
3) loss of half of the long arm of chromosome 5
4) trisomy of 21st chromosome
Ans: 2
55. Restriction endonuclease :
1) cuts the DNA molecule randomly
2) cuts the DNA molecule at specific sites
3) restricts the synthesis of DNA inside the nucleus
4) synthesizes DNA
Ans: 2
56. Antibodies in our body are complex :
1) lipoproteins 2) steroids 3) prostaglandins 4) glycoproteins
Ans: 4
57. Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is :
1) < 3.0 ppm
2) < 10 ppm
3) < 100 ppm
4) < 30 ppm
Ans: 2
58. Earthworms are :
1) ureotelic when plenty of water is available
2) uricotelic when plenty of water is available
3) uricotelic under conditions of water scarcity
4) ammonotelic when plenty of water is available
Ans: 4
59. Which of the following is an accumulation and release centre of neurohormones ?
1) Posterior pituitary lobe
2) Intermediate lobe of the pituitary
3) Hypothalamus
4) Anterior pituitary lobe
Ans: 3
60. Withdrawal of which of the following hormones is the immediate cause of menstruation ?
1) Eastrogens
2) FSH
3) FSH-RH
4) Progesterone
Ans: 4
61. Which one of the following statements is incorrect ?
1) The residual air in lungs slightly decreases the efficiency of respiration in mammals
2) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
3) In insects, circulating body fluids serve to distribute oxygen to tissues
4) The principle of countercurrent flow facilitates efficient respiration in gills of fishes 30
Ans: 1
62. Which one of the following has an open circulatory system ?
1) Pheretima 2) Periplaneta 3) Hirudinaria 4) Octopus
Ans: 2
63. Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis ?
1) ACTH 2) Insulin 3) Adrenalin 4) Glucagon
Ans: 3
64. The causative agent of mad-cow disease is a :
1) bacterium 2) prion 3) worm 4) virus
Ans: 2
65. The translocation of organic solutes in sieve tube members is supported by :
1) root pressure and transpiration pull
2) P-proteins
3) mass flow involving a carrier and ATP
4) cytoplasmic streaming
Ans: 3
66. Biradial symmetry and lack of cnidoblasts are the characteristics of :
1) Starfish and sea anemone
2) Ctenoplana and Beroe
3) Aurelia and Paramecium
4) Hydra and starfish
Ans: 2
67. The arrangement of the nuclei in a normal embryo sac in the dicot plants is :
1) 2 + 4 + 2
2) 3 + 2 + 3
3) 2 + 3 + 3
4) 3 + 3 + 2
Ans: 2
68. An enzyme that can stimulate germination of barley seeds is :
1) α-amylase
2) lipase
3) protease
4) invertase
Ans: 1
69. In a cereal grain the single cotyledon of embryo is represented by :
1) coleorhiza 2) scutellum 3) prophyll 4) coleoptile
Ans: 2
70. The majority of carbon dioxide produced by our body cells is transported to the lungs :
1) dissolved in the blood 2) as bircarbonates 3) as carbonates 4) attached to haemoglobin
Ans: 2
71. Triticale, the first man-made cereal crop, has been obtained by crossing wheat with :
1) rye 2) pearl millet 3) sugarcane 4) barley
Ans: 1
72. In order to obtain virus-free plants through tissue culture the best method is :
1) protoplast culture 2) embryo rescue 3) anther culture 4) meristem culture
Ans: 4
73. HIV that causes AIDS, first starts destroying :
1) B-lymphocytes 2) leucocytes 3) thrombocytes 4) helper T-lymphocytes
Ans: 4
74. In which one of the following sets of animals do all the four give birth to young ones ?
1) Lion, bat, whale, ostrich
2) Platypus, penguin, bat, hippopotamus
3) Shrew, bat, cat, kiwi
4) Kangaroo, hedgehog, dolphin, loris
Ans: 4
75. Sickle cell anemia has not been eliminated from the African population because :
1) it is controlled by recessive genes
2) it is not a fatal disease
3) it provides immunity against malaria
4) it is controlled by dominant genes
Ans: 3
76. Two common characters found in centipede, cockroach and crab are :
1) compound eyes and anal cerci 2) jointed legs and chitinous exoskeleton
3) green gland and tracheae 4) book lungs and antennae
Ans: 2
77. Both sickle cell anaemia and Huntington's chorea are :
1) bacteria-related diseases 2) congenital disorders 3) pollutant-induced disorders 4) virus-related diseases
Ans: 2
78. Angiotensinogen is a protein produced and secreted by :
1) macula densa cells
2) endothelial cells (cells lining the blood vessels)
3) liver cells
4) juxtaglomerular (JG) cells
Ans: 3
1) fat body with muscles
2) integument with muscles
3) bones with muscles
4) bones with bones
Ans: 2
52. Mast cells secrete :
1) hippurin 2) myoglobin 3) histamine 4) haemoglobin
Ans: 3
53. If a colourblind woman marries a normal visioned man, their sons will be :
1) all normal visioned 2) one-half colourblind and one-half normal
3) three-fourths colourbling and one-fourth normal 4) all colourblind
Ans: 4
54. Cri-du-chat syndrome in humans is caused by the :
1) fertilization of an XX egg by a normal Y-bearing sperm
2) loss of half of the short arm of chromosome 5
3) loss of half of the long arm of chromosome 5
4) trisomy of 21st chromosome
Ans: 2
55. Restriction endonuclease :
1) cuts the DNA molecule randomly
2) cuts the DNA molecule at specific sites
3) restricts the synthesis of DNA inside the nucleus
4) synthesizes DNA
Ans: 2
56. Antibodies in our body are complex :
1) lipoproteins 2) steroids 3) prostaglandins 4) glycoproteins
Ans: 4
57. Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is :
1) < 3.0 ppm
2) < 10 ppm
3) < 100 ppm
4) < 30 ppm
Ans: 2
58. Earthworms are :
1) ureotelic when plenty of water is available
2) uricotelic when plenty of water is available
3) uricotelic under conditions of water scarcity
4) ammonotelic when plenty of water is available
Ans: 4
59. Which of the following is an accumulation and release centre of neurohormones ?
1) Posterior pituitary lobe
2) Intermediate lobe of the pituitary
3) Hypothalamus
4) Anterior pituitary lobe
Ans: 3
60. Withdrawal of which of the following hormones is the immediate cause of menstruation ?
1) Eastrogens
2) FSH
3) FSH-RH
4) Progesterone
Ans: 4
61. Which one of the following statements is incorrect ?
1) The residual air in lungs slightly decreases the efficiency of respiration in mammals
2) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
3) In insects, circulating body fluids serve to distribute oxygen to tissues
4) The principle of countercurrent flow facilitates efficient respiration in gills of fishes 30
Ans: 1
62. Which one of the following has an open circulatory system ?
1) Pheretima 2) Periplaneta 3) Hirudinaria 4) Octopus
Ans: 2
63. Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis ?
1) ACTH 2) Insulin 3) Adrenalin 4) Glucagon
Ans: 3
64. The causative agent of mad-cow disease is a :
1) bacterium 2) prion 3) worm 4) virus
Ans: 2
65. The translocation of organic solutes in sieve tube members is supported by :
1) root pressure and transpiration pull
2) P-proteins
3) mass flow involving a carrier and ATP
4) cytoplasmic streaming
Ans: 3
66. Biradial symmetry and lack of cnidoblasts are the characteristics of :
1) Starfish and sea anemone
2) Ctenoplana and Beroe
3) Aurelia and Paramecium
4) Hydra and starfish
Ans: 2
67. The arrangement of the nuclei in a normal embryo sac in the dicot plants is :
1) 2 + 4 + 2
2) 3 + 2 + 3
3) 2 + 3 + 3
4) 3 + 3 + 2
Ans: 2
68. An enzyme that can stimulate germination of barley seeds is :
1) α-amylase
2) lipase
3) protease
4) invertase
Ans: 1
69. In a cereal grain the single cotyledon of embryo is represented by :
1) coleorhiza 2) scutellum 3) prophyll 4) coleoptile
Ans: 2
70. The majority of carbon dioxide produced by our body cells is transported to the lungs :
1) dissolved in the blood 2) as bircarbonates 3) as carbonates 4) attached to haemoglobin
Ans: 2
71. Triticale, the first man-made cereal crop, has been obtained by crossing wheat with :
1) rye 2) pearl millet 3) sugarcane 4) barley
Ans: 1
72. In order to obtain virus-free plants through tissue culture the best method is :
1) protoplast culture 2) embryo rescue 3) anther culture 4) meristem culture
Ans: 4
73. HIV that causes AIDS, first starts destroying :
1) B-lymphocytes 2) leucocytes 3) thrombocytes 4) helper T-lymphocytes
Ans: 4
74. In which one of the following sets of animals do all the four give birth to young ones ?
1) Lion, bat, whale, ostrich
2) Platypus, penguin, bat, hippopotamus
3) Shrew, bat, cat, kiwi
4) Kangaroo, hedgehog, dolphin, loris
Ans: 4
75. Sickle cell anemia has not been eliminated from the African population because :
1) it is controlled by recessive genes
2) it is not a fatal disease
3) it provides immunity against malaria
4) it is controlled by dominant genes
Ans: 3
76. Two common characters found in centipede, cockroach and crab are :
1) compound eyes and anal cerci 2) jointed legs and chitinous exoskeleton
3) green gland and tracheae 4) book lungs and antennae
Ans: 2
77. Both sickle cell anaemia and Huntington's chorea are :
1) bacteria-related diseases 2) congenital disorders 3) pollutant-induced disorders 4) virus-related diseases
Ans: 2
78. Angiotensinogen is a protein produced and secreted by :
1) macula densa cells
2) endothelial cells (cells lining the blood vessels)
3) liver cells
4) juxtaglomerular (JG) cells
Ans: 3
79. In the mean and the median pertaining to a certain character of a population are of the same value, which of the follwing is most likely to occur
(a) a bi-modal distribution (b) a T-shaped curve
(c) a skewed curve (d) a normal distribution.
Ans: D
80. One gene-one enzyme relationship was established for the first time in
(a) Salmonella typhimurium (b) Escherichia coli
(c) Diplococcus pneumoniae (d) Neurospora crassa.
Ans: D
81. Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F2 segregation will show
(a) segregation in the expected 9 : 3 : 3 : 1 ratio (b) segregation in 3 : 1 ratio
(c) higher number of the parental types (d) higher number of the recombinant types.
Ans: C
82. In cloning of cattle, a fertilized egg is taken out of the mother’s womb and
(a) in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cow (b) in the eight cell stage the individual cells are separated under electrical field for further development in culture media.
(c) from this up to eight identical twins can be produced
(d) the egg is divided into 4 pairs of cells which are implanted into the womb of other cows
Ans: A
83. Ultrasound of how much frequency is beamed into human body for sonography ?
(a) 15 - 30 MHZ (b) 1 - 15 MHZ (b) 45 - 70 MHZ (d) 30 - 45 MHZ.
Ans: B
84. Two plants can be conclusively said to belong to the same species if they.
(a) have more than 90 per cent similar genes
(b) look similar and possess identical secondary metabolites
(c) have same number of chromosomes
(d) can reproduce freely with each other and form seeds.
Ans: D
85. Inheritances of skin color in humans is an example of
(a) point mutation (b) polygenic inheritance (c) codominance (d) chromosomal aberration.
Ans: B
86. When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed
(a) microevolution (b) co-evolution (c) convergent evolution (d) divergent evolution
Ans: C
87. Increased asthmatics attacks in certain seasons are related to
(a) eating fruits preserved in tin containers (b) inhalation of seasonal pollen
(c) low temperature (d) hot and humid environment.
Ans: B
88. Among the human ancestors the brain size was more that 1000 CC in
(a) Homo erectus (b) Ramapithecus (c) Homo habilis (d) Homo neanderthalensis
Ans: D
89. Industrial melanism as observed in peppered moth proves that
(a) the melanic form of the moth has no selective advantage over lighter form in industrial area
(b) the lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area
(c) melanism is a pollution-generated feature
(d) the true black melanic forms arise by a recurring random mutation.
Ans: D
90. A high density of elephant population in an area can result in
(a) intra specific competition (b) inter specific competition (c) predation on one another (d) mutualism.
Ans: A
91. A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?
(a) blood serum (b) sample from the thoracic duct of lymphatic system
(c) Whole blood from pulmonary vein (d) blood plasma.
Ans: A
92. Which one of the following ecosystem types has the highest annual net primary productivity?
(a) tropical deciduous forest (b) temperate evergreen forest
(c) temperate deciduous forest (d) tropical rain forest.
Ans: D
93. In human body, which one of the following is anatomically correct? (
a) Collar bones - 3 pairs (b) Salivary glands - 1 pairs (c) Cranial nerves - 10 pairs (d) Floating ribs - 2 pairs
Ans: D
94. Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they
(a) are RNA transcription initiator (b) help chromosome pairing
(c) prevent chromosome loss (d) act as replicons.
Ans: C
95. Bowman’s glands are located in the
(a) anterior pituitary (b) female reproductive system of cockroach
(c) olfactory epithelium of our nose (d) proximal end of uriniferous tubules.
Ans: C
96. Which one of the following pairs is wrongly matched ?
(a) yeast - ethanol (b) streptomycetes - antibiotic
(c) coliforms - vinegar (d) methanogens - gobar gas.
Ans: C
97. Which part of ovary in mammals acts as an endocrine gland after ovulation ?
(a) stroma (b) germinal epithelium
(c) vetelline membrane (d) Graafian follicle.
Ans: D
98. Opening of floral buds into flowers, is a type of
(a) autonomic movement of variation (b) paratonic movement of growth
(c) autonomic movement of growth (d) autonomic movement of locomotion.
Ans: C
99. Which one of the following is a matching pair of a body feature and the animal possessing it ?
(a) ventral central - Leech nervous system
(b) Pharyngeal gill slits - Chamaeleon absent in embryo
(c) ventral heart - Scorpion
(d) post-end tail - Octopus.
Ans: A
100. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
(a) isocitrate dehydrogenase (b) malate dehydrogenase
(c) succinate dehydrogenase (d) lactate dehydrogenase.
Ans: C
(a) a bi-modal distribution (b) a T-shaped curve
(c) a skewed curve (d) a normal distribution.
Ans: D
80. One gene-one enzyme relationship was established for the first time in
(a) Salmonella typhimurium (b) Escherichia coli
(c) Diplococcus pneumoniae (d) Neurospora crassa.
Ans: D
81. Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F2 segregation will show
(a) segregation in the expected 9 : 3 : 3 : 1 ratio (b) segregation in 3 : 1 ratio
(c) higher number of the parental types (d) higher number of the recombinant types.
Ans: C
82. In cloning of cattle, a fertilized egg is taken out of the mother’s womb and
(a) in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cow (b) in the eight cell stage the individual cells are separated under electrical field for further development in culture media.
(c) from this up to eight identical twins can be produced
(d) the egg is divided into 4 pairs of cells which are implanted into the womb of other cows
Ans: A
83. Ultrasound of how much frequency is beamed into human body for sonography ?
(a) 15 - 30 MHZ (b) 1 - 15 MHZ (b) 45 - 70 MHZ (d) 30 - 45 MHZ.
Ans: B
84. Two plants can be conclusively said to belong to the same species if they.
(a) have more than 90 per cent similar genes
(b) look similar and possess identical secondary metabolites
(c) have same number of chromosomes
(d) can reproduce freely with each other and form seeds.
Ans: D
85. Inheritances of skin color in humans is an example of
(a) point mutation (b) polygenic inheritance (c) codominance (d) chromosomal aberration.
Ans: B
86. When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed
(a) microevolution (b) co-evolution (c) convergent evolution (d) divergent evolution
Ans: C
87. Increased asthmatics attacks in certain seasons are related to
(a) eating fruits preserved in tin containers (b) inhalation of seasonal pollen
(c) low temperature (d) hot and humid environment.
Ans: B
88. Among the human ancestors the brain size was more that 1000 CC in
(a) Homo erectus (b) Ramapithecus (c) Homo habilis (d) Homo neanderthalensis
Ans: D
89. Industrial melanism as observed in peppered moth proves that
(a) the melanic form of the moth has no selective advantage over lighter form in industrial area
(b) the lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area
(c) melanism is a pollution-generated feature
(d) the true black melanic forms arise by a recurring random mutation.
Ans: D
90. A high density of elephant population in an area can result in
(a) intra specific competition (b) inter specific competition (c) predation on one another (d) mutualism.
Ans: A
91. A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?
(a) blood serum (b) sample from the thoracic duct of lymphatic system
(c) Whole blood from pulmonary vein (d) blood plasma.
Ans: A
92. Which one of the following ecosystem types has the highest annual net primary productivity?
(a) tropical deciduous forest (b) temperate evergreen forest
(c) temperate deciduous forest (d) tropical rain forest.
Ans: D
93. In human body, which one of the following is anatomically correct? (
a) Collar bones - 3 pairs (b) Salivary glands - 1 pairs (c) Cranial nerves - 10 pairs (d) Floating ribs - 2 pairs
Ans: D
94. Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they
(a) are RNA transcription initiator (b) help chromosome pairing
(c) prevent chromosome loss (d) act as replicons.
Ans: C
95. Bowman’s glands are located in the
(a) anterior pituitary (b) female reproductive system of cockroach
(c) olfactory epithelium of our nose (d) proximal end of uriniferous tubules.
Ans: C
96. Which one of the following pairs is wrongly matched ?
(a) yeast - ethanol (b) streptomycetes - antibiotic
(c) coliforms - vinegar (d) methanogens - gobar gas.
Ans: C
97. Which part of ovary in mammals acts as an endocrine gland after ovulation ?
(a) stroma (b) germinal epithelium
(c) vetelline membrane (d) Graafian follicle.
Ans: D
98. Opening of floral buds into flowers, is a type of
(a) autonomic movement of variation (b) paratonic movement of growth
(c) autonomic movement of growth (d) autonomic movement of locomotion.
Ans: C
99. Which one of the following is a matching pair of a body feature and the animal possessing it ?
(a) ventral central - Leech nervous system
(b) Pharyngeal gill slits - Chamaeleon absent in embryo
(c) ventral heart - Scorpion
(d) post-end tail - Octopus.
Ans: A
100. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
(a) isocitrate dehydrogenase (b) malate dehydrogenase
(c) succinate dehydrogenase (d) lactate dehydrogenase.
Ans: C