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MCQs

Total Questions : 195 | Page 5 of 20 pages
Question 41. Base analogs have the same hydrogen-bonding properties as the normal bases.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 42. Photoreactivation can cause repair of DNA damaged by which of the following mutagens?
  1.    UV rays
  2.    X-rays
  3.    Nitrous acid
  4.    Base analogs
 Discuss Question
Answer: Option A. -> UV rays
Answer: (a).UV rays
Question 43. Acridine orange is which type of mutagen?
  1.    base analog
  2.    chemical compounds
  3.    intercalating agents
  4.    transposons
 Discuss Question
Answer: Option C. -> intercalating agents
Answer: (c).intercalating agents
Question 44. What is the mutation rate for E.coli per bacterium per cell division?
  1.    5.8 x 10^-6
  2.    5.8 x 10^-9
  3.    5.8 x 10^-8
  4.    5.8 x 10^-7
 Discuss Question
Answer: Option C. -> 5.8 x 10^-8
Answer: (c).5.8 x 10^-8
Question 45. Which of the following enzyme is used to join the DNA fragments together?
  1.    polymerases
  2.    exonuclease
  3.    endonuclease
  4.    ligase
 Discuss Question
Answer: Option D. -> ligase
Answer: (d).ligase
Question 46. The transfer of genes from one cell to another by a bacteriophage is known as __________________
  1.    Recombination
  2.    Conjugation
  3.    Transduction
  4.    Transformation
 Discuss Question
Answer: Option C. -> Transduction
Answer: (c).Transduction
Question 47. Which of the enzymes are used to cut the recipient DNA?
  1.    endonuclease
  2.    exonuclease
  3.    ligases
  4.    polymerase
 Discuss Question
Answer: Option A. -> endonuclease
Answer: (a).endonuclease
Question 48. Bacterial recombination causes transformation of the recipient cell to _______________
  1.    donor cell
  2.    merozygote
  3.    zygote
  4.    recipient cell
 Discuss Question
Answer: Option B. -> merozygote
Answer: (b).merozygote
Question 49. Transfer of genes between cells that are in physical contact with one another is known as transformation.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 50. Genetic recombination occurs between homologous chromosomes.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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