Question

question 4 of 9
the \backbone\ of a single dna strand, which provides its structural framework, is formed by alternating
nitrogenous bases and amino acids.
phosphate groups and nitrogenous bases.
deoxyribose sugar and phosphate groups.

Explanation:

The backbone of a single - DNA strand is composed of alternating deoxyribose sugar and phosphate groups. Nitrogenous bases are attached to the deoxyribose sugar and are not part of the backbone structure. Amino acids are related to proteins, not the DNA backbone.

Answer:

C. Deoxyribose sugar and phosphate groups