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DNA Structure and Replication

DNA Structure and Replication
A cesium chloride will separate DNA molecules by

adhesion
resorption
density
absorption

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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?

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

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

linking number
helix frequency
twisting number
none of these

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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
pyrimidines
purines
All of these

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DNA Structure and Replication
The packing ratio of nucleosomes is about

8
9
7
6

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DNA Structure and Replication
Which of the following is not a structural motif in DNA binding proteins?

TFIID
zinc finger
bZIP
helix-turn-helix

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