Question

If DNA has 45,000 base pairs, how many complete turns will the DNA molecule take?

Answer 1

DNA is made up of two polynucleotide chains which are coiled in a right-handed fashion.

The pitch of the helix is 3.4 nm and there are approximately 10 base pairs in each turn.

Since, 10 base pairs = 1 complete turn,

45,000 base pairs = 45,000/10 = 4500 complete turns.