A circular 25000 base pair DNA molecule with no supercoils will have _____ helical twists if it is B-DNA.
A)about 2.5
B)about 25
C)about 250
D)about 2500
E)about 25000.

Name: A circular 25000 base pair DNA molecule with no supercoils will have _____ helical twists if it is B-DNA. A)about 2.5 B)about 25 C)about 250 D)about 2500 E)about 25000.
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Question

Quizplus · Accepted Answer

B-DNA has approximately 10 base pairs per helical turn, so a 25000 base pair DNA molecule will have about 2500 helical twists (25000/10 = 2500).

A Circular 25000 Base Pair DNA Molecule with No Supercoils