Question

Choose the correct answer from the alternatives given :
How far is each base pair from the next one in DNA double helix model?

• A. 2 nm
• B. 3.4 nm
• C. 34 nm
• D. 0.34 nm

Answer 1

The correct option is D 0.34 nm

The two chains of DNA are coiled in right handed fashion, The pitch of the helix is 3.4 nm with roughly 10 bp in each turn. Consequently, the distance between two base pairs in helix is approximately equal to 0.34 nm.