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MCQs

Total Questions : 116 | Page 6 of 12 pages
Question 51. In purification steps of nucleic-acids, phenol is used for _______________________
  1.    deproteinization
  2.    denaturation
  3.    lowering pH
  4.    lowering viscosity
 Discuss Question
Answer: Option A. -> deproteinization
Answer: (a).deproteinization
Question 52. Which type of gel is used for large nucleic acids?
  1.    acrylamide
  2.    cellulose
  3.    agarose
  4.    sephadex
 Discuss Question
Answer: Option C. -> agarose
Answer: (c).agarose
Question 53. Which of the following is used to precipitate the nucleic acids?
  1.    glycerol
  2.    ethanol
  3.    methanol
  4.    ethylene
 Discuss Question
Answer: Option B. -> ethanol
Answer: (b).ethanol
Question 54. Phenol is an active protein denaturant.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 55. Which technique is used to separate nucleic acids of size greater than 25 kb?
  1.    SDS-PAGE
  2.    Pulsed-field electrophoresis
  3.    2D- gel electrophoresis
  4.    Isoelectric focusing
 Discuss Question
Answer: Option B. -> Pulsed-field electrophoresis
Answer: (b).Pulsed-field electrophoresis
Question 56. Which of the following enzymes in bacteria are responsible for restricting the growth of viruses?
  1.    restriction endonuclease
  2.    topoisomerase
  3.    gyrase
  4.    protease
 Discuss Question
Answer: Option A. -> restriction endonuclease
Answer: (a).restriction endonuclease
Question 57. Which enzyme is used to join together two different types of DNA molecules?
  1.    ligase
  2.    endonuclease
  3.    exonuclease
  4.    protease
 Discuss Question
Answer: Option A. -> ligase
Answer: (a).ligase
Question 58. The first recombinant DNA molecule was synthesized in the year ______________
  1.    1962
  2.    1972
  3.    1982
  4.    1992
 Discuss Question
Answer: Option B. -> 1972
Answer: (b).1972
Question 59. EcoR1 exhibits a two-fold rotational symmetry.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 60. Which observation was made by Avery, Macleod, and McCarty?
  1.    DNA is a duplex molecule
  2.    DNA can be taken up from medium
  3.    DNA can denature at high temperatures
  4.    DNA is more stable than RNA
 Discuss Question
Answer: Option B. -> DNA can be taken up from medium
Answer: (b).DNA can be taken up from medium

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