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DNA Structure and Replication

DNA Structure and Replication
Which polymerase is active in DNA repairing

Polymerase II
none of these
Polymerase I
Polymerase III

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DNA Structure and Replication
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called

transposase
reverse transcriptase
restriction endonuclease
helicase

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DNA Structure and Replication
The size of a linear DNA fragment in a gel can be estimated by

the sedimentation coefficient
comparison with a molecular weight standard such as Hind III digested phage lambda
the time it takes the gel to run
fluorescence in UV light

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DNA Structure and Replication
The nicks or gaps between Okazaki fragments are eventually sealed by

DNA ligase
gyrase
polymerase
RNA ligase

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DNA Structure and Replication
If one cell has AT contents 40%, what will be the percentage of Guanine residue?

Guanine residue can not be calculated
15%
30%
60%

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DNA Structure and Replication
Which DNA polymerase removes RNA primers in DNA synthesis?

Polymerase III
Polymerase I
Polymerase II
none of these

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