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  4. The pitch of the B-DNA is

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Q. The pitch of the B-DNA is

Biomolecules

Solution:

In B-DNA, one turn of helical strand has $10$ nucleotides.
The base pairs of DNA are stacked $3.4 \,\mathring{A}$ part.
$\therefore $ Pitch of the DNA $=3.4 \,\mathring{A} \times 10=34 \,\mathring{A}$