Question

x outlines a(n) ____________. nitrogen base nucleotide nitrogen base pair amino acid

Explanation:

A nucleotide is composed of a nitrogen - containing base, a five - carbon sugar, and a phosphate group. The structure outlined by X includes a nitrogen - base and other components typical of a nucleotide. Nitrogen base pairs are two nitrogen bases bonded together, and an amino acid is part of proteins, not the basic unit shown.

Answer:

nucleotide