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DNA Structure and Replication

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

linking number
none of these
twisting number
helix frequency

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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
above DNA containing 14N
all of these

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DNA Structure and Replication
Enzyme, responsible for proofreading base pairing is

DNA ligase
Primase
Telomerase
DNA polymerase

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DNA Structure and Replication
What is the exact name of the classical Watson-Crick double helix DNA?

X-DNA
A-DNA
Z-DNA
B-DNA

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DNA Structure and Replication
Who's X-ray work aided Watson and Crick in their discovery of the double helix?

R. Franklin
W.H. Bragg
L. Pauling
Leaderberg

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DNA Structure and Replication
The chromosomal DNA complexes with

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

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