DNA Structure and Replication – Section 1

36. E.coli DNA polymerases II and III lack

A. 5′ → 3′ exonuclease activity
B. 5′ → 3′ endonuclease activity
C. partially 5′ → 3′ exonuclease activity
D. partially 5′ → 3′ endonuclease activity

Correct Answer: A. 5′ → 3′ exonuclease activity

37. In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

A. protamines
B. purines
C. pyrimidines
D. all of the above

Correct Answer: A. protamines

38. Okazaki fragments occur during

A. transformation
B. replication
C. polymerase reaction
D. synthesis

Correct Answer: B. replication

39. DNA can be sequenced by the

A. chemical method
B. chain termination procedure
C. both (a) and (b)
D. physical method

Correct Answer: C. both (a) and (b)

40. Which histone(s) are associated with the linker DNA of a nucleosome?

A. Histone H1
B. Histones H2A and H2B
C. Histone H3
D. Histone H4

Correct Answer: A. Histone H1

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