A protein's primary structure refers to:
ASequence of amino acids
B3D folding
CQuaternary assembly
DHelical coiling
Answer & Solution
Correct answer: A. Sequence of amino acids
Primary structure: linear amino acid sequence (peptide bonds). Secondary: α-helix, β-sheet (H-bonded patterns). Tertiary: 3D fold of a single chain. Quaternary: multiple chains.
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