In the double-helical structure of DNA, the pitch of the helix is

Question

In the double-helical structure of DNA, the pitch of the helix is (A) 3.4 nm (B) 0.34 nm (C) 6.6 nm (D) 34 nm

Tardigrade Admin · Accepted Answer

In B-DNA, one turn of the spiral has about 10 nucleotides on each strand of DNA. It occupies a distance of about 3.4 nm (34 mathringA) so that adjacent nucleotides or their bases are separated by a space of about 0.34 nm (3.4 mathringA).

Q. In the double-helical structure of DNA, the pitch of the helix is

3.4 nm

0.34 nm

6.6 nm

34 nm

6.6 x 10 $^{-} 9$ m

In B-DNA, one turn of the spiral has about 10 nucleotides on each strand of DNA. It occupies a distance of about 3.4 nm $(34 \overset{˚}{A})$ so that adjacent nucleotides or their bases are separated by a space of about 0.34 nm $(3.4 \overset{˚}{A})$ .