In the Watson-Crick model of DNA, the "sides" of the ladder are composed of
A) sugars.
B) bases.
C) hydrogen bonds.
D) sugar-phosphate molecules.
E) phosphate groups.

Question

Quizplus · Accepted Answer

The "sides" of the DNA ladder are composed of alternating sugar and phosphate molecules, which are connected by phosphodiester bonds. The nitrogenous bases are attached to the sugar molecules and project inward, forming the characteristic double helix structure.

In the Watson-Crick Model of DNA, the "Sides" of the Ladder