Question

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

Explanation:

Nucleic acids (like DNA and RNA) are made up of nucleotides. Monosaccharides are building blocks of carbohydrates. Fatty acids and glycerol are parts of lipids. Amino acids are building blocks of proteins. Peptides are short chains of amino acids.

Answer:

nucleotide