One turn of the helix in a B-form DNA is appr | vedclass

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Question

(D) The correct answer is $D$. In a $B$-form $DNA$ double helix,the structure consists of two antiparallel polynucleotide strands coiled around a comm

Vedclass · Accepted Answer

$3.4$

Vedclass · Answer

(D) The correct answer is $D$. In a $B$-form $DNA$ double helix,the structure consists of two antiparallel polynucleotide strands coiled around a common axis. The distance between two adjacent base pairs is approximately $0.34 \ nm$ $(3.4 \ \mathring{A})$. Since there are $10$ base pairs per turn of the helix,the length of one complete turn is $10 	imes 0.34 \ nm = 3.4 \ nm$ $(34 \ \mathring{A})$.

One turn of the helix in a $B$-form $DNA$ is approximately (in $nm$)

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