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DNA Structure and Replication

DNA Structure and Replication
Reverse transcriptase produces

RNA from RNA
DNA from RNA
DNA from peptides
RNA from DNA

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

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

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

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

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

polymerase
DNA ligase
gyrase
RNA ligase

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DNA Structure and Replication
In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

protamines
All of these
pyrimidines
purines

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DNA Structure and Replication
Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?

Erythromycin
Bleomycin
Tunicamycin
All of these

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