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DNA Structure and Replication

DNA Structure and Replication
Enzymes, responsible for unraveling short segments of DNA is

DNA polymerase
primase
helicase
DNA ligase

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

DNAb, DNA polymerase
DNAb, gyrase
Single stranded protein, DNAa
DNAa, gyrase

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DNA Structure and Replication
DNA replication takes place in which direction?

3' to 5'
5 'to 3'
Randomly
Vary from organism to organism

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

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

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DNA Structure and Replication
The site on a bacterial chromosome that marks the initiation point for chromosome replication is called

Ori
Pro
an initiation codon
a promoter

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DNA Structure and Replication
For the DNA replication in eukaryotes, the cell cycle consists of

G2 and M phases
S, G2 and M phases
G1, G2 and M phases
G1,S, G2 and M phases

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