Multiple choice

There are different types of DNA on the basis of their bases per turn, helical diameter, handedness of the turn of the helix, etc. These are A-DNA, B-DNA, C-DNA , D-DNA and Z-DNA found in the chromatin.

How many base pairs are there in B-DNA per turn of the helix?

  1. 10

  2. 12

  3. 8

  4. 9.33
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A Correct answer
Explanation

10 : B-DNA contain 10 base pairs per turn of the helix. Z-DNA contain 12 bp per turn of the helix; D-DNA have 8 bp per turn of the helix;  C-DNA have 9.33 bp per turn of the helix; A-DNA have 11 bp per turn of the helix.

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