Question:medium

Which of the following structure cannot be taken by the single subunit protein?

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Quaternary structures are unique to multimeric proteins like hemoglobin, which consist of more than one polypeptide chain.

Updated On: Feb 20, 2026

Anti-parallel beta sheet
Alpha helix
Tertiary structure
Quaternary structure

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The Correct Option is D

Solution and Explanation

A single protein subunit can develop secondary structures (alpha helices, beta sheets) and fold into a tertiary structure.
Quaternary structure involves interactions among multiple polypeptide chains, a state unattainable by a single subunit protein.

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