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DNA Structure and Replication

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

HSP-1
H-NS
All of these
HU

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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
One
Two
A smear

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DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

100 °C
90 °C
60°C
70 °C

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DNA Structure and Replication
DNA helicase is used to

unwind the double helix
break a phosphodiester bond in DNA strand
None of these
interact the double helix closely

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DNA Structure and Replication
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called

helicase
transposase
reverse transcriptase
restriction endonuclease

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DNA Structure and Replication
The role of primase is to

synthesize an RNA primer to begin the elongation process
proofread base pairing
dismantle RNA primer
cleave and unwinds short sections of DNA ahead of the replication fork

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