DNA can best be described as
A) two backbones of alternating deoxyribose and nitrogenous base on the exterior, with phosphates on the interior
B) two backbones of alternating deoxyribose and nitrogenous base on the interior, with phosphates on the exterior
C) two backbones of alternating deoxyribose and phosphate on the exterior, with nitrogenous bases on the interior
D) two backbones of alternating deoxyribose and phosphate on the interior, with nitrogenous bases on the exterior
E) two backbones of alternating nitrogenous base and phosphate on the exterior, with deoxyriboses on the interior

Question

Quizplus · Accepted Answer

DNA is structured as a double helix with two backbones made of alternating sugar (deoxyribose) and phosphate groups on the outside, and pairs of nitrogenous bases (adenine, thymine, cytosine, and guanine) on the inside, forming the rungs of the ladder.

DNA Can Best Be Described as