Which statement about proteins and amino acids is true?

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Multiple Choice

Which statement about proteins and amino acids is true?

Proteins are polymers built from amino acids joined by peptide bonds, and in the polymer each amino acid sits as an amino acid residue. The sequence of these residues forms the protein's primary structure, and the specific arrangement of residues (with their distinctive side chains) drives folding and function. Nucleotides form nucleic acids, monosaccharides form carbohydrates, and fatty acids form lipids, so those options describe other biomolecule classes. Some proteins may carry carbohydrate or lipid groups as attachments, but the protein’s fundamental backbone is the amino acid residues.

Proteins are polymers built from amino acids joined by peptide bonds, and in the polymer each amino acid sits as an amino acid residue. The sequence of these residues forms the protein's primary structure, and the specific arrangement of residues (with their distinctive side chains) drives folding and function. Nucleotides form nucleic acids, monosaccharides form carbohydrates, and fatty acids form lipids, so those options describe other biomolecule classes. Some proteins may carry carbohydrate or lipid groups as attachments, but the protein’s fundamental backbone is the amino acid residues.

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