Question

the \backbone\ of a dna molecule is made of: (select all that apply)
cytosine
deoxyribose sugar
adenine
nitrogen base
phosphate group
rewatch

Explanation:

DNA is a double - helix structure. The backbone of the DNA molecule is composed of alternating deoxyribose sugar and phosphate group. Cytosine, adenine, and nitrogen bases (in general, like guanine and thymine too) are part of the nucleotide bases that pair up in the interior of the DNA helix (not the backbone).

Answer:

Deoxyribose Sugar, Phosphate Group