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DNA Structure and Replication

DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

helix frequency
none of these
linking number
twisting number

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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

DNA polymerase
none of these
strandase
helicase

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DNA Structure and Replication
The DNA polymerase in bacteria, responsible for DNA synthesis is

Polymerase I
all of these
Polymerase III
Polymerase II

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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
First evident that DNA is genetic material comes from the experiment of Griffith is

replication
translation
transformation
transduction

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

One
About 100
none of these
Thousands and tens of thousands

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