CSIR UGC NET LIFE SCIENCE EXAM. DEC. QUESTION NO.41 TO 50 WITH SOLUTION
Q51. An interrupted mating experiment was performed between Hfr Strs a+ b+ c+ and f- Strr a- b- c- s strains. The genotype of majority of streptomycin resistant exconjugant after 10,20 and 30 minutes of interrupted mating is given below-
The most probable gene order would be-
(a) a b c (b) c a b
(c) b a c (d) a c b
Answer-D
Q52.Which one of the following functions is not served by the plasma proteins?
(a) Blood clotting
(b) O2 transport
(c) Hormone binding and transport
(d) Buffering capacity of blood
Answer-B
Q53. Two plants with white flower are crossed. White flower arise due top recessive mutation all F1 progeny have red flowers. When the F1 plants are selfed, both red and white flowered progeny are observed. In what ratio will red- flowered plants and white flowered plants occur?
(a)1:1 (b) 3:1
(c)9:7 (d) 15:1
Answer-C
Q54. The population density of an insect species increases from 40 to 46 in one month. If the birth rate during that period is 0.4 what is the death rate?
(a)0.25 (b)0.15
(c)0.87 (d)0.40
Answer-A
Q55. Two 18-residue helical peptides A and B are enantiomers. They can be distinguished by-
(a) recording there MALDI mass spectrum
(b) hydrolysis followed by amino acid analysis
(c) sequencing by Edman's method
(d) examining their circular dichroism spectra
Answer-D
Q56. Schizocoelous coelom formation, mouth formation from embryonic blastopore, spiral and determinate cleavage are characteristics of-
(a) deuterostomes
(b) pseudocoelomates
(c) protists
(d) protostomes
Answer-D
Q57.Which species concept utilizes morphological and molecular characters to distinguish between species?
(a) Evolutionary
(b) Ecological
(c) Biological
(d) Phylogenetic
Answer-D
Q58. Worker bees, instead of themselves reproducing, help the queen reproduce. This behaviour is explained as an example of-
(a) kin selection
(b) group selection
(c) sexual selection
(d) natural selection
Answer-A
Q59.Which of the following is a correct match of the animal with its taxonomic group?
(a)Hirudinea-leech, Chelicerata-Horse shoe creb, Cestoda-Tapeworm Echinoidea-sea urchins, Earthworm Oligochaeta-Earthworm
(b)Hirudinea-Earthworm,Chelicerata-Horse shoe creb,Cestoda-Octopus, Echinoidea-Tapeworm,Cephalopoda-Earthworm,Oligochaeta-leech,
(c)Hirudinea-Tapeworm,Chelicerata-leech, Cestoda-Tapeworm,Echinoidea-Horse shoe creb, Cephalopoda-Earthworm,Oligochaeta- Octopus,
(d)Hirudinea-leech, Chelicerata-Tapeworm,Cestoda-Earthworm,Echinoidea-sea urchins, Cephalopoda- Octopus,Oligochaeta-Horse shoe creb,
Answer-A
Q60.The wings of insect and the wings of bats represent a case of-
(a) divergent evolution
(b) convergent evolution
(c) parallel evolution
(d) neutral evolution
Answer-B
CSIR UGC/JRF NET LIFE SCIENCE DEC. EXAM PAPER QUESTION NO. 61 TO 70 WITH SOLUTION
Q51. An interrupted mating experiment was performed between Hfr Strs a+ b+ c+ and f- Strr a- b- c- s strains. The genotype of majority of streptomycin resistant exconjugant after 10,20 and 30 minutes of interrupted mating is given below-
The most probable gene order would be-
(a) a b c (b) c a b
(c) b a c (d) a c b
Answer-D
Q52.Which one of the following functions is not served by the plasma proteins?
(a) Blood clotting
(b) O2 transport
(c) Hormone binding and transport
(d) Buffering capacity of blood
Answer-B
Q53. Two plants with white flower are crossed. White flower arise due top recessive mutation all F1 progeny have red flowers. When the F1 plants are selfed, both red and white flowered progeny are observed. In what ratio will red- flowered plants and white flowered plants occur?
(a)1:1 (b) 3:1
(c)9:7 (d) 15:1
Answer-C
Q54. The population density of an insect species increases from 40 to 46 in one month. If the birth rate during that period is 0.4 what is the death rate?
(a)0.25 (b)0.15
(c)0.87 (d)0.40
Answer-A
Q55. Two 18-residue helical peptides A and B are enantiomers. They can be distinguished by-
(a) recording there MALDI mass spectrum
(b) hydrolysis followed by amino acid analysis
(c) sequencing by Edman's method
(d) examining their circular dichroism spectra
Answer-D
Q56. Schizocoelous coelom formation, mouth formation from embryonic blastopore, spiral and determinate cleavage are characteristics of-
(a) deuterostomes
(b) pseudocoelomates
(c) protists
(d) protostomes
Answer-D
Q57.Which species concept utilizes morphological and molecular characters to distinguish between species?
(a) Evolutionary
(b) Ecological
(c) Biological
(d) Phylogenetic
Answer-D
Q58. Worker bees, instead of themselves reproducing, help the queen reproduce. This behaviour is explained as an example of-
(a) kin selection
(b) group selection
(c) sexual selection
(d) natural selection
Answer-A
Q59.Which of the following is a correct match of the animal with its taxonomic group?
(a)Hirudinea-leech, Chelicerata-Horse shoe creb, Cestoda-Tapeworm Echinoidea-sea urchins, Earthworm Oligochaeta-Earthworm
(b)Hirudinea-Earthworm,Chelicerata-Horse shoe creb,Cestoda-Octopus, Echinoidea-Tapeworm,Cephalopoda-Earthworm,Oligochaeta-leech,
(c)Hirudinea-Tapeworm,Chelicerata-leech, Cestoda-Tapeworm,Echinoidea-Horse shoe creb, Cephalopoda-Earthworm,Oligochaeta- Octopus,
(d)Hirudinea-leech, Chelicerata-Tapeworm,Cestoda-Earthworm,Echinoidea-sea urchins, Cephalopoda- Octopus,Oligochaeta-Horse shoe creb,
Answer-A
Q60.The wings of insect and the wings of bats represent a case of-
(a) divergent evolution
(b) convergent evolution
(c) parallel evolution
(d) neutral evolution
Answer-B
CSIR UGC/JRF NET LIFE SCIENCE DEC. EXAM PAPER QUESTION NO. 61 TO 70 WITH SOLUTION
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