Exercise: Dna Replication

Questions for: Dna Replication

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