Biology for IGCSE & O level - Biological Molecules (Section 3 - No. 40)
Which of the following best describes the secondary structure of a protein?
The sequence of amino acids
The overall 3D shape of the protein
The alpha-helices and beta-pleated sheets
The interaction between multiple polypeptide chains
Explanation
Secondary structure involves local folding patterns like alpha-helices and beta-pleated sheets.
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