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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
linking number
twisting number
none of these

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DNA Structure and Replication
Which polymerase is active in DNA repairing

Polymerase I
none of these
Polymerase II
Polymerase III

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

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DNA Structure and Replication
Each replication bubbles consists of

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

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Can not be compared
Decreases
Remains same
Increases

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

hydrogen bonds between the pair of bases
covalent bonds between the pair of bases
ionic bonds between the pair of bases
None of these

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