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DNA Structure and Replication

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

strandase
none of these
helicase
DNA polymerase

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DNA Structure and Replication
Deoxyribonucleoside triphosphates, being need in the chain termination methods are

dATP
dTTP
all of these
dGTP and dCTP

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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%?

Increases
Remains same
Can not be compared
Decreases

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DNA Structure and Replication
Which of the following would not contain DNA?

Glass crystals
Bacteria
Yeast
Mold

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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
What is the approximate percentage of repetitive DNA sequences in human DNA?

40 to 50%
30 to 40%
10 to 20%
20 to 30%

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