Question

Nucleic acids are composed of:

A. A phosphate group, a pentose sugar, a carboxylic acid
B. A nitrogen base, an amino group, a carboxylic acid
C. A pentose sugar, a nitrogen base, an R group
D. A phosphate group, a pentose sugar, a nitrogen base

Answer 1

D

{ignore this}

Answer 2

Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base.