Question

From the given structure of a DNA, one helix turn contains how many base pairs?

• A. 7
• B. 10
• C. 14
• D. 18

Answer 1

The correct option is B 10

Since, one complete turn of the double helix is 3.4 nm long and distance between two consecutive base pairs should be 0.34 nm; thus each helix has 10 base pairs. Correct answer is B.