Biology for IGCSE & O level - Biological Molecules (Section 4 - No. 32)
How does a polypeptide become a protein?
By linking to another polypeptide
By becoming a double helix
By folding into a specific 3D shape
By forming a glycosidic bond
Explanation
A protein is formed when a polypeptide chain folds into a specific 3D conformation.
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