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MCQs

Total Questions : 369 | Page 7 of 37 pages
Question 61. Actinomycin D is an inhibitor of
  1.    Transcription
  2.    Translation
  3.    Replication
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Transcription
Answer: (a).Transcription
Question 62. RNA primer is removed from the Okazaki fragment by
  1.    DNA polymerase I
  2.    DNA polymerase II
  3.    DNA polymerase III
  4.    RNA polymerase
 Discuss Question
Answer: Option A. -> DNA polymerase I
Answer: (a).DNA polymerase I
Question 63. Repressors bind to
  1.    Promoter
  2.    Enhancer
  3.    Operator
  4.    Hormone response element
 Discuss Question
Answer: Option C. -> Operator
Answer: (c).Operator
Question 64. Binding of the prokaryotic DNA dependent RNA polymerase to promoter site is inhibited by
  1.    Rifampicin
  2.    Tetracycline
  3.    Puromycin
  4.    Streptomycin
 Discuss Question
Answer: Option A. -> Rifampicin
Answer: (a).Rifampicin
Question 65. Number of hydrogen bonds that form between U and A in a Watson-Crick base pair interactions?
  1.    0
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option C. -> 2
Answer: (c).2
Question 66. An example of RNA-dependent DNA polymerase is
  1.    Reverse transcriptase
  2.    DNA ligase
  3.    RNA polymerase I
  4.    RNA polymerase II
 Discuss Question
Answer: Option A. -> Reverse transcriptase
Answer: (a).Reverse transcriptase
Question 67. Which of the following statements about viruses is true?
  1.    They contain DNA
  2.    They contain RNA
  3.    They contain protein
  4.    They are susceptible to lipid solvents
 Discuss Question
Answer: Option C. -> They contain protein
Answer: (c).They contain protein
Question 68. The enzyme used in the formation of cDNA from mRNA is
  1.    Polymerase
  2.    Helicase
  3.    Reverse transcriptase
  4.    Gyrase
 Discuss Question
Answer: Option C. -> Reverse transcriptase
Answer: (c).Reverse transcriptase
Question 69. Reverse transcriptase does not catalyze
  1.    RNA-dependent DNA synthesis
  2.    RNA degradation
  3.    DNA-dependent DNA synthesis
  4.    DNA-dependent RNA synthesis
 Discuss Question
Answer: Option D. -> DNA-dependent RNA synthesis
Answer: (d).DNA-dependent RNA synthesis
Question 70. Which of the following are not DNA viruses?
  1.    Hepatitis B virus
  2.    Influenza A virus
  3.    CMV virus
  4.    Parvovirus
 Discuss Question
Answer: Option B. -> Influenza A virus
Answer: (b).Influenza A virus

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