Each nucleotide in a nucleic acid contains
Anitrogen base + pentose sugar + phosphate
Ban amino group, carboxyl group, and R group
Ctwo amino acids linked by a peptide bond
Dglucose, fructose, and water
Answer & Solution
Correct answer: A. nitrogen base + pentose sugar + phosphate
A nucleotide is the three-part building block of DNA and RNA: nitrogen base (A, G, C, T or U), pentose sugar (deoxyribose for DNA, ribose for RNA), and phosphate. Amino + carboxyl + R is an amino acid; peptide bonds link amino acids, not nucleotides; sugars don't assemble nucleic acids.
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