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DNA Structure and Replication

DNA Structure and Replication
The DNA is negatively super coiled, complexes to histone,

All of these
HU
HSP-1
H-NS

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DNA Structure and Replication
DNA polymerases I also has

5'-3' endonuclease activity
5'-3' exonuclease activity
3'-5'exonuclease activity
both (a) and (b)

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

ionic bonds between the pair of bases
hydrogen bonds between the pair of bases
covalent bonds between the pair of bases
None of these

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

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DNA Structure and Replication
The DNA polymerase in bacteria, responsible for DNA synthesis is

Polymerase III
all of these
Polymerase I
Polymerase II

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DNA Structure and Replication
After one replication in 15N, how many bands should be observed in a cesium chloride gradient?

One
Two
A smear
Three

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