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DNA Structure and Replication

DNA Structure and Replication
How does ethidium bromide interact with DNA?

It binds to adenine
It does not interact
It binds to phosphate
It intercalates between bases

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DNA Structure and Replication
Which polymerase is active in DNA repairing

Polymerase II
Polymerase III
Polymerase I
none of these

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DNA Structure and Replication
In a cesium chloride gradient, DNA labeled with 15N and centrifuged will form a band

all of these
with 14N-containing DNA
below DNA containing 14N
above DNA containing 14N

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DNA Structure and Replication
What does ligase do during replication of DNA?

Makes copies of mRNA from DNA
Joins nicks in DNA strands
Digests mRNA when it is no longer needed
Synthesizes the lagging strand

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DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

positive pole
negative pole
will not migrate
none of these

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DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

none of these
DNA polymerase
helicase
strandase

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MORE MCQ ON DNA Structure and Replication

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