alleryA 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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