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DNA Replication

DNA Replication
The enzyme that catalyzes the synthesis of DNA is called

helicase
DNA gyrase
DNA polymerase
DNA ligase

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DNA Replication
Which of the following lacks 3'-5' exonuclease activity?

T4 DNA ligase
Short fragment of DNA polymerase I
All of these
Taq DNA polymerase

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DNA Replication
DNA replication rates in prokaryotes are approximately of the order of

10,000 bases per second
1,000 bases per second
10 bases per second
1,00 bases per second

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DNA Replication
During DNA replication in prokaryotes, synthesis begins on the circular chromosome

at the promoter
always at the same place
randomly on the chromosome
at any stretch of DNA that is high in AT pairs

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DNA Replication
The synthesis of DNA by DNA polymerase occurs in the

3' to 3' direction
3' to 5' direction
5' to 3' direction
5' to 5' direction

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DNA Replication
Which of the following repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides?

DNA gyrase
Topoisomerases
Helicase
DNA ligase

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