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NEET(2013) Karnataka - Biology Questions and Answers

NEET biology 31. Which of the following is not a property of the genetic code?
a. Universal
b. Non-overlapping
c. Ambiguous
d. Degeneracy
32. Genetic variation in a population arises due to
a. Mutations only
b. Recombination only
c. Mutations as well as recombination
d. Reproductive isolation and selection
33. Satellite RNAs are present in some
a. Plant viruses
b. Viroids
c. Prions
d. Bacteriophages
34. One of the most frequently used techniques in DNA fingerprinting is
a) AFLP
b) VNTR
c) SSCP
d) SCAR
35. Which one of the following vectors is used to replace the defective gene in gene therapy?
a. Ti plasmid
b. Adenovirus
c. Cosmid
d. Ri plasmid
36. Which of the following statements is not true about somatic embryogenesis?
a. A somatic embryo develops from a somatic cell
b. The pattern of development of a somatic embryo is comparable to that of a zygotic embryo
c. Somatic embryos can develop from microspores
d. Somatic embryo is induced usually by an auxin such as 2, 4-D
37. Genes of interest can be selected from a genomic library by using
a. Restriction enzymes
b. Cloning vectors
c. DNA probes
d. Gene targets
38. During the process of isolation of DNA, chilled ethanol is added to
a. Remove proteins such as histones
b. Precipitate DNA
c. Break open the cell to release DNA
d. Facilitate action of restriction enzymes
39. RNA interference involves
a. Synthesis of mRNA from DNA
b. Synthesis of cDNA from RNA using reverse transcriptase
c. Silencing of specific mRNA due to complementary RNA
d. Interference of RNA in synthesis of DNA
40. Benthic organisms are affected most by
a) Water-holding capacity of soil
b) Light reaching the forest floor
c) Surface turbulence of water
d) Sediment characteristics of aquatic ecosystems
Answers
31. c. Ambiguous
32. c. Mutations as well as recombination
33. a. Plant viruses
34. b) VNTR
35. b. Adenovirus
36. c. Somatic embryos can develop from microspores
37. c. DNA probes
38. b. Precipitate DNA
39. c. Silencing of specific mRNA due to complementary RNA
40. d) Sediment characteristics of aquatic ecosystems

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