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One turn of the helix in a B-form DNA is...

One turn of the helix in a B-form DNA is approximately-

A

3.4 nm

B

2 nm

C

20 nm

D

0.34 nm

Text Solution

Verified by Experts

The correct Answer is:
A
The DNA consists of two strands that are wrapped around one another to form helical structure. It has three forms of DNA – A DNA, B – DNA and Z – DNA.
B form of DNA has dimension of about 0.34 nm between bases, 3.4 nm per turn, about 10 bp per turn
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