Question

which best describes the structure of a nucleotide?
a. base, sugar ring, and phosphate
b. a base and a protein
c. cytosine and guanine
d. thymine and adenine

Explanation:

A nucleotide is composed of a nitrogen - containing base, a five - carbon sugar (sugar ring), and a phosphate group. Options B, C, and D do not fully describe the structure of a nucleotide.

Answer:

A. Base, sugar ring, and phosphate