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DNA Structure and Replication

DNA Structure and Replication
In an agarose gel, DNA is moving from

left to right
A to B
anode to cathode
cathode to anode

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

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

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

Three
A smear
One
Two

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DNA Structure and Replication
DNA gyrase in E. coli

adds positive supercoils to chromosomal DNA
is required only at the oriC site
can be inhibited with antibiotics
performs the same function as helicase in eukaryotes

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DNA Structure and Replication
DNA polymerases I also has

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

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DNA Structure and Replication
The RNA primers used to initiate replication in E. coli

result in Okazaki fragments on leading strand
are joined together by DNA ligase
are removed by helicase + ATP
are removed by Pol I

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