BIOLOGY -PAGE 2
1. Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain ?
1) Lipase 2) Exonuclease 3) Endonuclease 4) Protease
Ans: 3
2. The name of Norman Borlaug is associated with :
1) Green revolution 2) Yellow revolution 3) White revolution 4) Blue revolution
Ans: 1
3. G-6-P dehydrogenase deficiency is associated with haemolysis of : 23
1) lymphocytes 2) RBCs 3) platelets 4) leucocytes
Ans: 2
4. In which one pair both the plants can be vegetatively propagated by leaf pieces ?
1) Bryophyllum and Kalanchoe 2) Chrysanthemum and Agave 3) Agave and Kalanchoe 4) Asparagus and Bryophyllum
Ans: 1
5. According to IUCN red list what is the status of red Panda (Athurus fulgens) ?
1) Vulnerable species 2) Critically endangered species 3) Extinct species 4) Endangered species
Ans: 4
6. Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction ?
1) Fibrinogen 2) Prothrombin 3) Heparin 4) Thromboplastin
Ans: 4
7. E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because :
1) in the presence of glucose, E. coli cells do not utilize lactose 2) they cannot transport lactose from the medium into the cell
3) the lac operon is constitutively active in these cells 4) they cannot synthesize functional β-galactosidase
Ans: 4
8. Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of :
1) polypetalous angiosperms 2) gamopetalous angiosperms 3) conifers 4) cycads
Ans: 4
9. Production of a human protein in bacteria by genetic engineering is possible because :
1) bacterial cell can carry out the RNA splicing reactions 2) the hutnan chromosome can replicate in bacterial cell
3) the mechanism of gene regulation is identical in humans and bacteria
4) the genetic code is universal
Ans: 4
10. From the following statements select the wrong one :
1) millepedes have two pairs of appendages in each segment of the body 2) prawn has two pairs of antennae
3) animals belonging to phylum-Porifera are exclusively marine 4) nematocysts are characteristic of the phylum - Cnidaria
Ans: 2
11. Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by :
1) (base-sugar-phosphate)n 2) base-sugar-OH 3) base-sugar-phosphate 4) sugar-phosphate
Ans: 3
12. More than 70% of world's freshwater is contained in :
1) Antarctica 2) Glaciers and Mountains 3) Greenland 4) Polar ice
Ans: 4
13. Which one of the following pairs is mismatched ?
1) Biomass burning — release of CO2 2) Fossil fuel burning — release of CO2
3) Nuclear power — radioactive wastes 4) Solar energy — green house effect
Ans: 4
14. Which one of the following characters is not typical of the class-mammalia ?
1) Seven cervical verebrae 2) Thecodont dentition 3) Ten pairs of cranial nerves 4) Alveolar lungs
Ans: 3
15. Which of the following is the simplest amino acid ?
1) Tyrosine 2) Asparagine 3) Glycine 4) Alanine
Ans: 3
16. Barophilic prokaryotes :
1) grow slowly in highly alkaline frozen lakes at high altitudes
2) occur in water containing high concentrations of barium hydroxide
3) grow and multiply in very deep marine sediments
4) readily grown and divides in sea water enriched in any soluble salt of barium
Ans: 3
17. Auxospores and hormocysts are formed, respectively, by :
1) several diatoms and a few cyanobacteria 2) several cyanobacteria and several diatoms
3) some diatoms and several cyanobacteria 4) some cyanobacteria and many diatoms
Ans: 1
18. Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these :
1) enhance oxidative metabolism
2) are conjugated proteins
3) are exclusively synthesized in the body of a living organism as at present
4) help in regulating metabolism
Ans: 4
19. Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?
1) Development of transgenic animals
2) Production of 'Dolly' the sheep by cloning
3) Prevalence of pesticide resistant insects
4) Development of organs from 'stern cells' for organ transplantation
Ans: 3
20. As compared to a C3 plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4 plants :
1) 2 2) 6 3) 0 4) 12
Ans: 4
21. In a man, abducens nerve is injured. Which one of the following functions will be affected ?
1) Movement of the eye ball 2) Swallowing 3) Movement of the tongue 4) Movement of the neck
Ans: 1
22. An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the :
1) preparation of pure cellulose by removing lignin
2) removal of oils present in the wood by treatment with suitable chemicals
3) removal of water from the wood by prolonged heating at approximately 50°C
4) treatment of wood with chemical that breakdown cellulose
Ans: 1
23. Protein synthesis in an animal cell occurs :
1) only on the ribosomes present in cytosol
2) on ribosomes present in cytoplasm as well as in mitochondria
3) only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
4) on ribosomes present in the nucleolus as well as in cytoplasm
Ans: 2
24. Which of the following is not true for a species ?
1) Members of a species can interbreed 2) Variations occurs among members of a species
3) Each species is reproductively isolated from every other species 4) Gene flow does not occur between the populations of a species
Ans: 4
25. One of the most important functions of botanical gardens is that :
1) one can observe tropical plants there 2) they allow ex situ conservation of germplasm
3) they provide the natural habitat for wild life 4) they provide a beautiful area for recreation
Ans: 2
26. The ability of the venus flytrap to capture insects is due to :
1) chemical stimulation by the prey 2) a passive process requiring no special ability on the part of the plant
3) specialized "muscle-like" cells 4) rapid turgor pressure changes
Ans: 4
27. Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example :
1) enlargement of body size by swallowing air in puffer fish 2) melanism in moths
3) poison fangs in snakes 4) colour change in chameleon
Ans: 3
28. At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium ?
1) 0.16 2) 0.48 3) 0.36 4) 0.24
Ans: 2
29. Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?
1) Microbes did not appear in stored meat 2) Larvae could appear in decaying organic matter
3) Microbes appeared from unsterilized organic matter 4) Meat was not spoiled, when heated and kept sealed in a vessel
Ans: 4
30. Biodiversity act of India was passed by the Parliament in the year :
1) 1996 2) 1992 3) 2002 4) 2000
Ans: 3
31. During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP ?
1) Conversion of pyruvic acid to acetyl Co-A 2) Electron transport chain 3) Glycolysis 4) Krebs cycle
Ans: 2
32. A woman with normal vision, but whose father was colour blind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy :
1) must have normal colour vision 2) will be partially colourblind since he is heterozygous for the colourblind mutant allele
3) must be colourblind 4) may be colourblind or may be of normal vision
Ans: 4
33. Ectophloic siphonostele is found in :
1) Adiantum and Cucurbitaceae 2) Osmunda and Equisetum 3) Marsilea and Botrychium 4) Dicksonia and maiden hair fern
Ans: 2
34. Which of the following represents the edible part of the fruit of litchi ?
1) Pericarp 2) Mesocarp 3) Juicy aril 4) Endocarp
Ans: 3
35. Carbohydrates, the most abundant biomolecules on earth, are produced by :
1) all bacteria, fungi and algae 2) fungi, algae and green plant cells
3) some bacteria, algae and green plant cells 4) viruses, fungi and bacteria
Ans: 3
36. Identify the correctly matched pair :
1) Montreal protocol - Global warming 2) Kyoto protocol - Climatic change
3) Ramsar convention - Ground water pollution 4) Basal convention - Biodiversity conservation
Ans: 2
37. Which of the following is not a hereditary disease ?
1) Cretinism
2) Cystic fibrosis
3) Thalassaemia
4) Haemophilia
Ans: 1
38. The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?
1) Cu, Mn, Fe 2) Co, Ni, Mo 3) Mn, Co, Ca 4) Ca, X, Na
Ans: 1
39. de Vries gave his mutation theory on organic evolution while working on :
1) Althea rosea 2) Drosophila melanogaster 3) Oenothera lamarckiana 4) Pisum sativum
Ans: 3
40. One of the examples of the action of the autonomous nervous system is :
1) knee-jerk response 2) pupillary reflex 3) swallowing of food 4) peristalsis of the intestines
Ans: 4
41. Which of the following is not used for disinfection of drinking water ?
1) Phenyl 2) Chloramine 3) Chlorine 4) Ozone
Ans: 1
42. Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on :
1) proton gradient 2) accumulation of K ions 3) accumulation of Na ions 4) membrane potential
Ans: 1
43. Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter :
1) acetylcholine 2) norepinephrine 3) dopamine 29
4) GABA
Ans: 3
44. All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia :
1) can induce root nodules on many plant species
2) can fix nitrogen in the free-living state
3) like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
4) forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
Ans: 2
45. An acromian process is characteristically found in the :
1) pelvic girdle of mammals 2) skull of frog 3) pectoral girdle of mammals 4) sperm of mammals
Ans: 3
46. In a type of apomixis known as adventive embryony, embryos develop directly from the :
1) nucellus or integuments 2) synergids or antipodals in an embryo sac 3) accessory embryo sacs in the ovule 4) zygote
Ans: 1
47. Through which cell of the embryo sac, does the pollen tube enter the embryo sac ?
1) Egg cell 2) Central cell 3) Persistant synergid 4) Degenerated synergid
Ans: 4
48. Epithelial cells of the intestine involved in food absorption have on their surface :
1) pinocytic vesicles 2) phagocytic vesicles 3) zymogen granules 4) micro-villi
Ans: 4
49. A patient is generally advised to specially, consume more meat, lentils, milk and eggs in diet only when he suffers from :
1) kwashiorkor 2) rickets 3) anaemia 4) scurvy
Ans: 1
50. Which one of the following pairs is mismatched ?
1) Savanna — Acacia trees 2) Prairie — epiphytes 3) Tundra — permafrost 4) Coniferous forest — evergreen trees
Ans: 2
1) Lipase 2) Exonuclease 3) Endonuclease 4) Protease
Ans: 3
2. The name of Norman Borlaug is associated with :
1) Green revolution 2) Yellow revolution 3) White revolution 4) Blue revolution
Ans: 1
3. G-6-P dehydrogenase deficiency is associated with haemolysis of : 23
1) lymphocytes 2) RBCs 3) platelets 4) leucocytes
Ans: 2
4. In which one pair both the plants can be vegetatively propagated by leaf pieces ?
1) Bryophyllum and Kalanchoe 2) Chrysanthemum and Agave 3) Agave and Kalanchoe 4) Asparagus and Bryophyllum
Ans: 1
5. According to IUCN red list what is the status of red Panda (Athurus fulgens) ?
1) Vulnerable species 2) Critically endangered species 3) Extinct species 4) Endangered species
Ans: 4
6. Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction ?
1) Fibrinogen 2) Prothrombin 3) Heparin 4) Thromboplastin
Ans: 4
7. E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because :
1) in the presence of glucose, E. coli cells do not utilize lactose 2) they cannot transport lactose from the medium into the cell
3) the lac operon is constitutively active in these cells 4) they cannot synthesize functional β-galactosidase
Ans: 4
8. Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of :
1) polypetalous angiosperms 2) gamopetalous angiosperms 3) conifers 4) cycads
Ans: 4
9. Production of a human protein in bacteria by genetic engineering is possible because :
1) bacterial cell can carry out the RNA splicing reactions 2) the hutnan chromosome can replicate in bacterial cell
3) the mechanism of gene regulation is identical in humans and bacteria
4) the genetic code is universal
Ans: 4
10. From the following statements select the wrong one :
1) millepedes have two pairs of appendages in each segment of the body 2) prawn has two pairs of antennae
3) animals belonging to phylum-Porifera are exclusively marine 4) nematocysts are characteristic of the phylum - Cnidaria
Ans: 2
11. Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by :
1) (base-sugar-phosphate)n 2) base-sugar-OH 3) base-sugar-phosphate 4) sugar-phosphate
Ans: 3
12. More than 70% of world's freshwater is contained in :
1) Antarctica 2) Glaciers and Mountains 3) Greenland 4) Polar ice
Ans: 4
13. Which one of the following pairs is mismatched ?
1) Biomass burning — release of CO2 2) Fossil fuel burning — release of CO2
3) Nuclear power — radioactive wastes 4) Solar energy — green house effect
Ans: 4
14. Which one of the following characters is not typical of the class-mammalia ?
1) Seven cervical verebrae 2) Thecodont dentition 3) Ten pairs of cranial nerves 4) Alveolar lungs
Ans: 3
15. Which of the following is the simplest amino acid ?
1) Tyrosine 2) Asparagine 3) Glycine 4) Alanine
Ans: 3
16. Barophilic prokaryotes :
1) grow slowly in highly alkaline frozen lakes at high altitudes
2) occur in water containing high concentrations of barium hydroxide
3) grow and multiply in very deep marine sediments
4) readily grown and divides in sea water enriched in any soluble salt of barium
Ans: 3
17. Auxospores and hormocysts are formed, respectively, by :
1) several diatoms and a few cyanobacteria 2) several cyanobacteria and several diatoms
3) some diatoms and several cyanobacteria 4) some cyanobacteria and many diatoms
Ans: 1
18. Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these :
1) enhance oxidative metabolism
2) are conjugated proteins
3) are exclusively synthesized in the body of a living organism as at present
4) help in regulating metabolism
Ans: 4
19. Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?
1) Development of transgenic animals
2) Production of 'Dolly' the sheep by cloning
3) Prevalence of pesticide resistant insects
4) Development of organs from 'stern cells' for organ transplantation
Ans: 3
20. As compared to a C3 plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4 plants :
1) 2 2) 6 3) 0 4) 12
Ans: 4
21. In a man, abducens nerve is injured. Which one of the following functions will be affected ?
1) Movement of the eye ball 2) Swallowing 3) Movement of the tongue 4) Movement of the neck
Ans: 1
22. An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the :
1) preparation of pure cellulose by removing lignin
2) removal of oils present in the wood by treatment with suitable chemicals
3) removal of water from the wood by prolonged heating at approximately 50°C
4) treatment of wood with chemical that breakdown cellulose
Ans: 1
23. Protein synthesis in an animal cell occurs :
1) only on the ribosomes present in cytosol
2) on ribosomes present in cytoplasm as well as in mitochondria
3) only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
4) on ribosomes present in the nucleolus as well as in cytoplasm
Ans: 2
24. Which of the following is not true for a species ?
1) Members of a species can interbreed 2) Variations occurs among members of a species
3) Each species is reproductively isolated from every other species 4) Gene flow does not occur between the populations of a species
Ans: 4
25. One of the most important functions of botanical gardens is that :
1) one can observe tropical plants there 2) they allow ex situ conservation of germplasm
3) they provide the natural habitat for wild life 4) they provide a beautiful area for recreation
Ans: 2
26. The ability of the venus flytrap to capture insects is due to :
1) chemical stimulation by the prey 2) a passive process requiring no special ability on the part of the plant
3) specialized "muscle-like" cells 4) rapid turgor pressure changes
Ans: 4
27. Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example :
1) enlargement of body size by swallowing air in puffer fish 2) melanism in moths
3) poison fangs in snakes 4) colour change in chameleon
Ans: 3
28. At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium ?
1) 0.16 2) 0.48 3) 0.36 4) 0.24
Ans: 2
29. Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?
1) Microbes did not appear in stored meat 2) Larvae could appear in decaying organic matter
3) Microbes appeared from unsterilized organic matter 4) Meat was not spoiled, when heated and kept sealed in a vessel
Ans: 4
30. Biodiversity act of India was passed by the Parliament in the year :
1) 1996 2) 1992 3) 2002 4) 2000
Ans: 3
31. During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP ?
1) Conversion of pyruvic acid to acetyl Co-A 2) Electron transport chain 3) Glycolysis 4) Krebs cycle
Ans: 2
32. A woman with normal vision, but whose father was colour blind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy :
1) must have normal colour vision 2) will be partially colourblind since he is heterozygous for the colourblind mutant allele
3) must be colourblind 4) may be colourblind or may be of normal vision
Ans: 4
33. Ectophloic siphonostele is found in :
1) Adiantum and Cucurbitaceae 2) Osmunda and Equisetum 3) Marsilea and Botrychium 4) Dicksonia and maiden hair fern
Ans: 2
34. Which of the following represents the edible part of the fruit of litchi ?
1) Pericarp 2) Mesocarp 3) Juicy aril 4) Endocarp
Ans: 3
35. Carbohydrates, the most abundant biomolecules on earth, are produced by :
1) all bacteria, fungi and algae 2) fungi, algae and green plant cells
3) some bacteria, algae and green plant cells 4) viruses, fungi and bacteria
Ans: 3
36. Identify the correctly matched pair :
1) Montreal protocol - Global warming 2) Kyoto protocol - Climatic change
3) Ramsar convention - Ground water pollution 4) Basal convention - Biodiversity conservation
Ans: 2
37. Which of the following is not a hereditary disease ?
1) Cretinism
2) Cystic fibrosis
3) Thalassaemia
4) Haemophilia
Ans: 1
38. The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?
1) Cu, Mn, Fe 2) Co, Ni, Mo 3) Mn, Co, Ca 4) Ca, X, Na
Ans: 1
39. de Vries gave his mutation theory on organic evolution while working on :
1) Althea rosea 2) Drosophila melanogaster 3) Oenothera lamarckiana 4) Pisum sativum
Ans: 3
40. One of the examples of the action of the autonomous nervous system is :
1) knee-jerk response 2) pupillary reflex 3) swallowing of food 4) peristalsis of the intestines
Ans: 4
41. Which of the following is not used for disinfection of drinking water ?
1) Phenyl 2) Chloramine 3) Chlorine 4) Ozone
Ans: 1
42. Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on :
1) proton gradient 2) accumulation of K ions 3) accumulation of Na ions 4) membrane potential
Ans: 1
43. Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter :
1) acetylcholine 2) norepinephrine 3) dopamine 29
4) GABA
Ans: 3
44. All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia :
1) can induce root nodules on many plant species
2) can fix nitrogen in the free-living state
3) like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
4) forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
Ans: 2
45. An acromian process is characteristically found in the :
1) pelvic girdle of mammals 2) skull of frog 3) pectoral girdle of mammals 4) sperm of mammals
Ans: 3
46. In a type of apomixis known as adventive embryony, embryos develop directly from the :
1) nucellus or integuments 2) synergids or antipodals in an embryo sac 3) accessory embryo sacs in the ovule 4) zygote
Ans: 1
47. Through which cell of the embryo sac, does the pollen tube enter the embryo sac ?
1) Egg cell 2) Central cell 3) Persistant synergid 4) Degenerated synergid
Ans: 4
48. Epithelial cells of the intestine involved in food absorption have on their surface :
1) pinocytic vesicles 2) phagocytic vesicles 3) zymogen granules 4) micro-villi
Ans: 4
49. A patient is generally advised to specially, consume more meat, lentils, milk and eggs in diet only when he suffers from :
1) kwashiorkor 2) rickets 3) anaemia 4) scurvy
Ans: 1
50. Which one of the following pairs is mismatched ?
1) Savanna — Acacia trees 2) Prairie — epiphytes 3) Tundra — permafrost 4) Coniferous forest — evergreen trees
Ans: 2
51. Which of the following is the relatively most accurate method for dating of fossils ?
1) Potassium - argon method 2) Uranium- lead method 3) Electron - spin resonance method 4) Radio - carbon method
Ans: 3
52. Which one of the following represents an ovule, where the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other ?
1) Circinotropous 2) Anatropous 3) Amphitropous 4) Atropous
Ans: 3
53. Potometer works on the principle of :
1) amount of water absorbed equals the amount transpired 2) osmotic pressure
3) root pressure 4) potential difference between the tip of the tube and that of the plant
Ans: 1
54. In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues ?
1) Stem and root 2) All parts 3) Shoot tips and root tips 4) Flowers, fruits and leaves
Ans: 3
55. Which one of the following makes use of RNA as a template to synthesize DNA ?
1) Reverse transcriptase 2) DNA dependant RNA polymerase 3) DNA polymerase 4) RNA polymerase
Ans: 1
56. In contrast to annelids the platyhelminths show :
1) radial symmetry 2) presence of pseudocoel 3) bilateral symmetry 31
4) absence of body cavity
Ans: 4
57. Which of the following statements regarding enzyme inhibition is correct ?
1) Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
2) Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
3) Competitive inhibition is seen when the substrate and the inhibitor compete
4) Non-competitive inhibitors often bind to the enzyme irreversibly
Ans: 3
58. Which of the following pairs is correctly matched ?
1) Cartilaginous joint — skull bones 2) Hinge joint — between vertebrae
3) Fibrous joint — between phalanges 4) Gliding joint — between zygapophyses of the successive vertebrae
Ans: 4
59. The catalytic efficiency of two different enzymes can be compared by the :
1) the Km value 2) the pH optimum value 3) formation of the product 4) molecular size of the enzyme
Ans: 1
60. Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used :
1) only on plates with streptomycin 2) on plates with minimal medium
3) only on plates without streptomycin
4) on plates with and without streptomycin
Ans: 1
61. Which of the following is generally used for induced mutagenesis in crop plants ?
1) Alpha particles 2) X-rays 3) UV (260 nm) 4) Gamma rays (from cobalt 60)
Ans: 4
62. Haemophilia is more commonly seen in human males than in human females because :
1) this disease is due to an X-linked dominant mutation
2) a greater proportion of girls die in infancy
3) this disease is due to an X-linked recessive mutation
4) this disease is due to a Y-linked recessive mutation
Ans: 3
63. A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by :
1) Down syndrome 2) triploidy 3) Turner syndrome 4) super femaleness
Ans: 1
64. In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with tne genotype
1) aaBB 2) AaBB 3) AABB 4) aabb
Ans: 4
65. Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells ?
1) Osteocytes 2) Malpighian layer of the skin 3) Liver cells 4) Neurons
Ans: 4
66. Secretin and cholecystokinin are digestive hormones. They are secreted in :
1) oesophagus 2) ileum 3) duodenum 4) pyloric stomach
Ans: 3
67. Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction ? 1) Euglena 2) Amoeba 3) Paramecium 4) Trypanosoma
Ans: 3
68. AIDS is caused by HIV that principally infects :
1) all lymphocytes 2) activator B cells 3) T 4 lymphocytes 4) cytotoxic T cells
Ans: 3
69. According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect? 1) Proteins in cell membranes an travel within the lipid bilayer
2) Proteins can remain confined within certain domains of the membrane
3) Proteins can also undergo flip-flop movements in the lipid bilayer
4) Many proteins remain completely embedded within the lipid bilayer
Ans: 3
70. If mammalian ovum fails to get fertilized, which one of the following is unlikely ?
1) Corpus luteum will disintegrate 2) Estrogen secretion further decreases
3) Primary follicle starts developing 4) Progesterone secretion rapidly declines
Ans: 2
71. A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of :
1) fats 2) ketones 3) amino acids 4) glucose
Ans: 2
72. Why is vivipary an undesirable character for annual crop plants ?
1) It reduces the vigour of plant
2) The seeds cannot be stored under normal conditions for the next season
3) The seeds exhibit long dormancy
4) It adversely affects the fertility of the plant
Ans: 2
73. Bacillus thuringiensis (Bt) strains have been used for designing novel :
1) bio-metallurgical technique 2) bio-mineralization processes 3) bio-insecticidal plants 4) bio-fertilizers
Ans: 3
74. The salivary gland chromosomes in the dipteran larvae, are useful in gene mapping because :
1) these are much longer in size 2) these are easy to stain 3) these are fused 4) they have endoreduplicated chromosomes
Ans: 4
75. Which group of three of the following five statements (1-5) contain is all three correct statements regarding beri-beri ?
A. A crippling disease prevalent among the native population of sub-Sahara Africa.
B. A deficiency disease caused by lack of thiamine (vitamin B1).
C. A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein.
D. Occurs in those countries where the staple diet is polished rice.
E. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.
mental deterioration and finally heart failure.
1) A, B and D 2) B, C and E 3) A, C and E 4) B, D and E
Ans: 4
76. Photosynthetic Active Radiation (PAR) has the following range of wavelengths :
1) 400 - 700 nm 2) 450 - 950 nm 3) 340 - 450 nm 4) 500 - 600 nm
Ans: 1
77. Golden rice is a transgenic crop of the future with the following improved trait :
1) high lysine (essential amino acid) content 2) insect resistance 3) high protein content 4) high vitamin A content
Ans: 4
78. Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness.
1) Valium 2) Morphine 3) Hashish 4) Amphetamines
Ans: 1
1) Potassium - argon method 2) Uranium- lead method 3) Electron - spin resonance method 4) Radio - carbon method
Ans: 3
52. Which one of the following represents an ovule, where the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other ?
1) Circinotropous 2) Anatropous 3) Amphitropous 4) Atropous
Ans: 3
53. Potometer works on the principle of :
1) amount of water absorbed equals the amount transpired 2) osmotic pressure
3) root pressure 4) potential difference between the tip of the tube and that of the plant
Ans: 1
54. In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues ?
1) Stem and root 2) All parts 3) Shoot tips and root tips 4) Flowers, fruits and leaves
Ans: 3
55. Which one of the following makes use of RNA as a template to synthesize DNA ?
1) Reverse transcriptase 2) DNA dependant RNA polymerase 3) DNA polymerase 4) RNA polymerase
Ans: 1
56. In contrast to annelids the platyhelminths show :
1) radial symmetry 2) presence of pseudocoel 3) bilateral symmetry 31
4) absence of body cavity
Ans: 4
57. Which of the following statements regarding enzyme inhibition is correct ?
1) Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
2) Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
3) Competitive inhibition is seen when the substrate and the inhibitor compete
4) Non-competitive inhibitors often bind to the enzyme irreversibly
Ans: 3
58. Which of the following pairs is correctly matched ?
1) Cartilaginous joint — skull bones 2) Hinge joint — between vertebrae
3) Fibrous joint — between phalanges 4) Gliding joint — between zygapophyses of the successive vertebrae
Ans: 4
59. The catalytic efficiency of two different enzymes can be compared by the :
1) the Km value 2) the pH optimum value 3) formation of the product 4) molecular size of the enzyme
Ans: 1
60. Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used :
1) only on plates with streptomycin 2) on plates with minimal medium
3) only on plates without streptomycin
4) on plates with and without streptomycin
Ans: 1
61. Which of the following is generally used for induced mutagenesis in crop plants ?
1) Alpha particles 2) X-rays 3) UV (260 nm) 4) Gamma rays (from cobalt 60)
Ans: 4
62. Haemophilia is more commonly seen in human males than in human females because :
1) this disease is due to an X-linked dominant mutation
2) a greater proportion of girls die in infancy
3) this disease is due to an X-linked recessive mutation
4) this disease is due to a Y-linked recessive mutation
Ans: 3
63. A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by :
1) Down syndrome 2) triploidy 3) Turner syndrome 4) super femaleness
Ans: 1
64. In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with tne genotype
1) aaBB 2) AaBB 3) AABB 4) aabb
Ans: 4
65. Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells ?
1) Osteocytes 2) Malpighian layer of the skin 3) Liver cells 4) Neurons
Ans: 4
66. Secretin and cholecystokinin are digestive hormones. They are secreted in :
1) oesophagus 2) ileum 3) duodenum 4) pyloric stomach
Ans: 3
67. Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction ? 1) Euglena 2) Amoeba 3) Paramecium 4) Trypanosoma
Ans: 3
68. AIDS is caused by HIV that principally infects :
1) all lymphocytes 2) activator B cells 3) T 4 lymphocytes 4) cytotoxic T cells
Ans: 3
69. According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect? 1) Proteins in cell membranes an travel within the lipid bilayer
2) Proteins can remain confined within certain domains of the membrane
3) Proteins can also undergo flip-flop movements in the lipid bilayer
4) Many proteins remain completely embedded within the lipid bilayer
Ans: 3
70. If mammalian ovum fails to get fertilized, which one of the following is unlikely ?
1) Corpus luteum will disintegrate 2) Estrogen secretion further decreases
3) Primary follicle starts developing 4) Progesterone secretion rapidly declines
Ans: 2
71. A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of :
1) fats 2) ketones 3) amino acids 4) glucose
Ans: 2
72. Why is vivipary an undesirable character for annual crop plants ?
1) It reduces the vigour of plant
2) The seeds cannot be stored under normal conditions for the next season
3) The seeds exhibit long dormancy
4) It adversely affects the fertility of the plant
Ans: 2
73. Bacillus thuringiensis (Bt) strains have been used for designing novel :
1) bio-metallurgical technique 2) bio-mineralization processes 3) bio-insecticidal plants 4) bio-fertilizers
Ans: 3
74. The salivary gland chromosomes in the dipteran larvae, are useful in gene mapping because :
1) these are much longer in size 2) these are easy to stain 3) these are fused 4) they have endoreduplicated chromosomes
Ans: 4
75. Which group of three of the following five statements (1-5) contain is all three correct statements regarding beri-beri ?
A. A crippling disease prevalent among the native population of sub-Sahara Africa.
B. A deficiency disease caused by lack of thiamine (vitamin B1).
C. A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein.
D. Occurs in those countries where the staple diet is polished rice.
E. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.
mental deterioration and finally heart failure.
1) A, B and D 2) B, C and E 3) A, C and E 4) B, D and E
Ans: 4
76. Photosynthetic Active Radiation (PAR) has the following range of wavelengths :
1) 400 - 700 nm 2) 450 - 950 nm 3) 340 - 450 nm 4) 500 - 600 nm
Ans: 1
77. Golden rice is a transgenic crop of the future with the following improved trait :
1) high lysine (essential amino acid) content 2) insect resistance 3) high protein content 4) high vitamin A content
Ans: 4
78. Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness.
1) Valium 2) Morphine 3) Hashish 4) Amphetamines
Ans: 1
79. What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ?
1) 16
2) 24
3) 32
4) 8
Ans: 2
80. Pineapple (annanas) fruit develops from :
1) a unilocular polycarpillary flower
2) a multipistillate syncarpous flower
3) a cluster of compactly borne flowers on a common axis
4) a multilocular monocarpillary flower
Ans: 3
81. Golden rice is a promising transgenic crop. When released for cultivation, it will help in :
1) alleviation of vitamin-A deficiency
2) pest resistance
3) herbicide tolerance
4) producing a petrol-like fuel from rice
Ans: 1
82. Parthenocarpic tomato fruits can be produced by :
1) removing androecium of flowers before pollen grains are released
2) treating the plants with low concentrations of gibberellic acid and auxins
3) raising the plants from vernalized seeds
4) treating the plants with phenylmercuric acetate
Ans: 2
83. How does pruning help in making the hedge dense ?
1) It induces the differentiation of new shoots from the rootstock
2) It frees axillary buds from apical dominance
3) The apical shoot grows faster after pruning
4) It releases wound hormones
Ans: 2
84. The 'blue baby' syndrome results from :
1) excess of chloride
2) methaemoglobin
3) excess of dissolved oxygen
4) excess of TDS (Total Dissolved Solids)
Ans: 2
85. Praying mentis is a good example of :
1) mullerian mimicry
2) warning colouration
3) social insects
4) camouflage
Ans: 3
86. Which one of the following statements is correct ?
1) Neurons regulate endocrine activity, but not vice versa
2) Endocrine glands regulate neural activity and nervous system regulates endocrine glands
3) Neither hormones control neural activity nor the neurons control endocrine activity
4) Endocrine glands regulate neural activity, but not vice versa
Ans: 1
87. Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms ?
1) Thiamine
2) Folic acid and cobalamine
3) Riboflavin
4) Iron compounds
Ans: 4
88. Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield ?
1) Frequent irrigation of the crop
2) Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer
3) Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5- trichlorophenoxy acetic acid
4) Application of iron and magnesium to promote synthesis of chlorophyll
Ans: 4
89. In which of the following fruits is the edible part the aril ?
1) Custard apple
2) Pomegranate
3) Orange
4) Litchi
Ans: 4
1) 16
2) 24
3) 32
4) 8
Ans: 2
80. Pineapple (annanas) fruit develops from :
1) a unilocular polycarpillary flower
2) a multipistillate syncarpous flower
3) a cluster of compactly borne flowers on a common axis
4) a multilocular monocarpillary flower
Ans: 3
81. Golden rice is a promising transgenic crop. When released for cultivation, it will help in :
1) alleviation of vitamin-A deficiency
2) pest resistance
3) herbicide tolerance
4) producing a petrol-like fuel from rice
Ans: 1
82. Parthenocarpic tomato fruits can be produced by :
1) removing androecium of flowers before pollen grains are released
2) treating the plants with low concentrations of gibberellic acid and auxins
3) raising the plants from vernalized seeds
4) treating the plants with phenylmercuric acetate
Ans: 2
83. How does pruning help in making the hedge dense ?
1) It induces the differentiation of new shoots from the rootstock
2) It frees axillary buds from apical dominance
3) The apical shoot grows faster after pruning
4) It releases wound hormones
Ans: 2
84. The 'blue baby' syndrome results from :
1) excess of chloride
2) methaemoglobin
3) excess of dissolved oxygen
4) excess of TDS (Total Dissolved Solids)
Ans: 2
85. Praying mentis is a good example of :
1) mullerian mimicry
2) warning colouration
3) social insects
4) camouflage
Ans: 3
86. Which one of the following statements is correct ?
1) Neurons regulate endocrine activity, but not vice versa
2) Endocrine glands regulate neural activity and nervous system regulates endocrine glands
3) Neither hormones control neural activity nor the neurons control endocrine activity
4) Endocrine glands regulate neural activity, but not vice versa
Ans: 1
87. Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms ?
1) Thiamine
2) Folic acid and cobalamine
3) Riboflavin
4) Iron compounds
Ans: 4
88. Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield ?
1) Frequent irrigation of the crop
2) Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer
3) Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5- trichlorophenoxy acetic acid
4) Application of iron and magnesium to promote synthesis of chlorophyll
Ans: 4
89. In which of the following fruits is the edible part the aril ?
1) Custard apple
2) Pomegranate
3) Orange
4) Litchi
Ans: 4
90. Which one of the following aminoacids was not found to be synthesized in Miller's experiment ?
1) Glycine 2) Aspartic acid 3) Glutamic acid 4) Alanine
Ans: 3
91. Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year :
1) 1986 2) 1987 3) 1988 4) 1985
Ans: 2
92. The formula for exponential population growth is :
1) dt/dN = rN 2) dN/rN = dt 3) rN/dN = dt 4) dN/dt = rN
Ans: 4
93. Crop plants grown in monoculture are :
1) low in yield 2) free from intraspecific competition 3) characterised by poor root system 4) highly prone to pests
Ans: 4
94. Which one of the following is not used for construction of ecological pyramids ?
1) Dry weight 2) Number of individuals 3) Rate of energy flow 4) Fresh weight
Ans: 4
95. Niche overlap indicates :
1) active co-operation between two species 2) two different parasites on the same host
3) sharing of one or more resources between the two species 4) mutualism between two species
Ans: 2
96. In photosystem-I, the first electron acceptor is :
1) ferredoxin 2) cytochrome 3) plastocyanin 4) an iron-sulphur protein
Ans: 4
97. Treatment of seed at low temperature under moist conditions to break its dormancy is called :
1) scarification 2) vernalization 3) chelation 4) stratification
Ans: 4
98. Which one of the following is the most suitable, medium for culture of Drosophila melanogaster ?
1) Moist bread 2) Agar agar 3) Ripe banana 4) Cow dung
Ans: 3
99. Which one of the following is not included under in situ conservation ?
1) Sanctuary 2) Botanical garden 3) Biosphere reserve 4) National park
Ans: 2
100. Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis ?
1) Erythromycin 2) Neomycin 3) Streptomycin 4) Tetracycline
Ans: 4
1) Glycine 2) Aspartic acid 3) Glutamic acid 4) Alanine
Ans: 3
91. Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year :
1) 1986 2) 1987 3) 1988 4) 1985
Ans: 2
92. The formula for exponential population growth is :
1) dt/dN = rN 2) dN/rN = dt 3) rN/dN = dt 4) dN/dt = rN
Ans: 4
93. Crop plants grown in monoculture are :
1) low in yield 2) free from intraspecific competition 3) characterised by poor root system 4) highly prone to pests
Ans: 4
94. Which one of the following is not used for construction of ecological pyramids ?
1) Dry weight 2) Number of individuals 3) Rate of energy flow 4) Fresh weight
Ans: 4
95. Niche overlap indicates :
1) active co-operation between two species 2) two different parasites on the same host
3) sharing of one or more resources between the two species 4) mutualism between two species
Ans: 2
96. In photosystem-I, the first electron acceptor is :
1) ferredoxin 2) cytochrome 3) plastocyanin 4) an iron-sulphur protein
Ans: 4
97. Treatment of seed at low temperature under moist conditions to break its dormancy is called :
1) scarification 2) vernalization 3) chelation 4) stratification
Ans: 4
98. Which one of the following is the most suitable, medium for culture of Drosophila melanogaster ?
1) Moist bread 2) Agar agar 3) Ripe banana 4) Cow dung
Ans: 3
99. Which one of the following is not included under in situ conservation ?
1) Sanctuary 2) Botanical garden 3) Biosphere reserve 4) National park
Ans: 2
100. Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis ?
1) Erythromycin 2) Neomycin 3) Streptomycin 4) Tetracycline
Ans: 4