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DNA Structure and Replication

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

absorption
density
adhesion
resorption

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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
The chromosomal DNA complexes with

three types of histone as H1, H2A and H4
four types of histone as H1, H2A, H3 and H4
five types of histone as H1, H2A, H2B, H3 and H4
two types of histone as H1 and H4

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DNA Structure and Replication
The overall conclusion of the Hershey-Chase experiment was that

the ratio of Adenine to thymine was always the same
phage DNA was similar to bacterial DNA
DNA was responsible for heredity
proteins and DNA were responsible for heredity

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DNA Structure and Replication
Which polymerase is active in DNA repairing

Polymerase I
none of these
Polymerase III
Polymerase II

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

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

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