Exercise: Dna Structure And Replication

Questions for: Dna Structure And Replication

The nicks or gaps between Okazaki fragments are eventually sealed by
A:
gyrase
B:
DNA ligase
C:
RNA ligase
D:
polymerase
Answer: B
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Reverse transcriptase produces
A:
DNA from peptides
B:
RNA from DNA
C:
RNA from RNA
D:
DNA from RNA
Answer: D
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After one replication in 15N, how many bands should be observed in a cesium chloride gradient?
A:
One
B:
Two
C:
Three
D:
A smear
Answer: A
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The packing ratio of nucleosomes is about
A:
6
B:
8
C:
7
D:
9
Answer: C
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The rapid appearance of HIV-1 strains that are resistant to AIDS drugs is due in part to which of the following property of its reverse transcriptase?
A:
AZT (zidovudine) is too expensive to be taken in effective doses
B:
The RNase H domain of p66 causes error prone synthesis
C:
It lacks a proofreading exonuclease
D:
It has low affinity for the correct dNTP's
Answer: C
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