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DNA Structure and Replication

DNA Structure and Replication
DNA replication takes place in which direction?

Randomly
5 'to 3'
3' to 5'
Vary from organism to organism

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DNA Structure and Replication
What is the range of melting point temperatures (Tm) for most DNA molecules?

60 to 80°C
80 to l00°C
50 to 60°C
70 to 90°C

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

A smear
Two
Three
One

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

no activity
nickase activity
exonuclease activity
endonuclease activity

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

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

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

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

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