What accounts for the uniform diameter of the DNA molecule?
A) The two sides of the molecule are held together by hydrogen bonds.
B) The alternating sugar and phosphate backbone coils around the outside of the helix.
C) One side of the molecule has an unconnected 5' phosphate group,and the opposite end has an unconnected 3'hydroxyl group.
D) The 3' carbon of one deoxyribose and the 5' carbon of another deoxyribose bond together.
E) A purine always bonds with a pyrimidine.

Question

Quizplus · Accepted Answer

The uniform diameter of the DNA molecule is due to the pairing of a purine (adenine or guanine) with a pyrimidine (thymine or cytosine), which ensures consistent width throughout the DNA helix.

What Accounts for the Uniform Diameter of the DNA Molecule