Question

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which molecule is the building block of a triglyceride and other lipids?
nucleotide
nitrogenous base
monosaccharide
disaccharide
peptide
fatty acid

Explanation:

Triglycerides and many other lipids are composed of fatty - acids and glycerol. Fatty acids are the key building blocks for these lipid molecules. Nucleotides are building blocks of nucleic acids, nitrogenous bases are part of nucleotides, monosaccharides and disaccharides are related to carbohydrates, and peptides are related to proteins.

Answer:

fatty acid