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MCQs

Total Questions : 15 | Page 2 of 2 pages
Question 11. Which of the following enzymes unwind short stretches of DNA helix immediately ahead of a replication fork?
  1.    Single-stranded binding proteins
  2.    Topoisomerases
  3.    DNA polymerases
  4.    Helicases
 Discuss Question
Answer: Option D. -> Helicases
Question 12. DNA replication rates in prokaryotes are approximately of the order of
  1.    10,000 bases per second
  2.    1,000 bases per second
  3.    1,00 bases per second
  4.    10 bases per second
 Discuss Question
Answer: Option B. -> 1,000 bases per second
Question 13. Which of the following lacks 3'-5' exonuclease activity?
  1.    Short fragment of DNA polymerase I
  2.    Taq DNA polymerase
  3.    All of these
  4.    T4 DNA ligase
 Discuss Question
Answer: Option C. -> All of these
Question 14. During DNA replication in prokaryotes, synthesis begins on the circular chromosome
  1.    always at the same place
  2.    at the promoter
  3.    randomly on the chromosome
  4.    at any stretch of DNA that is high in AT pairs
 Discuss Question
Answer: Option A. -> always at the same place
Question 15. The synthesis of DNA by DNA polymerase occurs in the
  1.    5' to 5' direction
  2.    3' to 3' direction
  3.    5' to 3' direction
  4.    3' to 5' direction
 Discuss Question
Answer: Option C. -> 5' to 3' direction

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