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DNA Structure and Replication

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

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

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DNA Structure and Replication
TM refers to the temperature at which

All of these
50% of a DNA molecule is denatured
50% of a protein molecules are denatured
membranes are 50% fluid

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

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

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DNA Structure and Replication
What bands will be observed in a cesium chloride gradient after two rounds of replication?

One medium and one heavy band
One light and one medium band
One light, one medium and one heavy band
One medium band

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DNA Structure and Replication
Which polymerase is active in DNA repairing

Polymerase I
Polymerase II
none of these
Polymerase III

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DNA Structure and Replication
How does ethidium bromide interact with DNA?

It binds to adenine
It does not interact
It intercalates between bases
It binds to phosphate

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