Proteins consist of which units?

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Multiple Choice

Proteins consist of which units?

Proteins are polymers formed by linking amino acids through peptide bonds, and the repeating unit in a protein is an amino acid residue. Each amino acid becomes part of the chain after losing a small molecule during bond formation, so the term “residue” reflects its incorporated state in the protein. There are 20 standard amino acids that provide the diversity of protein structure and function. The other options correspond to building blocks of other biopolymers—monosaccharide units for carbohydrates, nucleotides for nucleic acids, and fatty acids for lipids.

Proteins are polymers formed by linking amino acids through peptide bonds, and the repeating unit in a protein is an amino acid residue. Each amino acid becomes part of the chain after losing a small molecule during bond formation, so the term “residue” reflects its incorporated state in the protein. There are 20 standard amino acids that provide the diversity of protein structure and function. The other options correspond to building blocks of other biopolymers—monosaccharide units for carbohydrates, nucleotides for nucleic acids, and fatty acids for lipids.

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