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DNA Structure and Replication

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

Two
Three
One
A smear

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

RNA ligase
gyrase
polymerase
DNA ligase

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DNA Structure and Replication
DNA polymerases I also has

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

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DNA Structure and Replication
Each replication bubbles consists of

2 replication forks
4 replication forks
1 replication forks
3 replication forks

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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
A cesium chloride will separate DNA molecules by

resorption
absorption
adhesion
density

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