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DNA Structure and Replication

DNA Structure and Replication
Each replication bubbles consists of

3 replication forks
4 replication forks
1 replication forks
2 replication forks

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DNA Structure and Replication
E.coli DNA polymerases II and III lack

5' → 3' exonuclease activity
partially 5' → 3' exonuclease activity
5' → 3' endonuclease activity
partially 5' → 3' endonuclease activity

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DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

5' → 3' polymerase
All of these
5' → 3' exonuclease
3' → 5' exonuclease

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DNA Structure and Replication
Messelsen and Stahl model of replication was called

conservative replication
dispersive replication
semi-conservative replication
Cri du Chat

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DNA Structure and Replication
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called

restriction endonuclease
reverse transcriptase
helicase
transposase

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DNA Structure and Replication
The packing ratio of nucleosomes is about

6
9
7
8

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