Question

Match each level of protein structure organization to its definition.
a three-dimensional shape formed from multiple polypeptides
a chain of many amino acids linked by peptide bonds
the final three-dimensional shape of a single polypeptide
a shape formed when a polypeptide chain folds


Protein structure
Definition
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primary structure

secondary structure

tertiary structure

quaternary structure

Answer 1

primary structure — a chain of many amino acids linked by peptide bonds

secondary structure — a shape formed when a polypeptide chain folds (e.g., α-helix, β-sheet)

tertiary structure — the final three-dimensional shape of a single polypeptide

quaternary structure — a three-dimensional shape formed from multiple polypeptides