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:

DNA's backbone is made of phosphate groups and deoxyribose (a 5 - carbon sugar). Nitrogen bases (adenine, thymine, cytosine, guanine) are attached to the deoxyribose but are not part of the backbone. Ribose is a sugar in RNA, not DNA.

Answer:

A. phosphate, D. deoxyribose