Each DNA strand has a backbone that consists of alternating
A) covalent and ionic bonds.
B) nitrogen-containing bases.
C) hydrogen bonds.
D) sugar and phosphate molecules.
E) covalent and hydrogen bonds.

Question

Quizplus · Accepted Answer

The backbone of a DNA strand is made up of sugar (deoxyribose) and phosphate molecules joined by covalent bonds, forming a sugar-phosphate backbone.

Each DNA Strand Has a Backbone That Consists of Alternating