Question

the \backbone\ of the dna molecule consists of what molecule(s)?
select all that apply
a phosphate
b nitrogen bases
c ribose
d deoxyribose

Explanation:

To determine the components of the DNA backbone, we recall the structure of DNA. The DNA backbone is formed by alternating deoxyribose (a sugar) and phosphate groups. Nitrogen bases are attached to the deoxyribose but are not part of the backbone. Ribose is the sugar in RNA, not DNA. So phosphate (a) and deoxyribose (d) are part of the DNA backbone.

Answer:

a. phosphate, d. deoxyribose