The backbone or sides of a DNA helix consists of

Question

Quizplus · Accepted Answer

The backbone, or sides, of a DNA helix consists of a sugar-phosphate chain made up of alternating sugar (deoxyribose) and phosphate groups, held together by phosphodiester bonds. The nitrogenous base pairs (adenine, thymine, cytosine, and guanine) are attached to the sugar molecules and project inward, forming the rungs of the ladder-like structure of DNA. Therefore, option B is correct. Options A, C, and D are incorrect as they do not accurately describe the backbone or sides of a DNA helix.

The Backbone or Sides of a DNA Helix Consists of