Question

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which molecule is the building block of a nucleic acid?
nucleotide glycerol monosaccharide
fatty acid peptide disaccharide

Explanation:

Nucleic acids like DNA and RNA are polymers made up of nucleotides. Each nucleotide consists of a sugar, a phosphate group, and a nitrogen - containing base. Glycerol is part of lipids, monosaccharides and disaccharides are carbohydrates, fatty acids are in lipids, and peptides are related to proteins.

Answer:

nucleotide