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nmdcat.online June 27, 2026

In the context of protein structure, the characteristic feature of the secondary structure is

A. The linear sequence of amino acids in the polypeptide chain
B. The folding driven by interactions between R-groups
C. Localized folding patterns like α-helices and β-pleated sheets
✓
D. The association of multiple polypeptide subunits

📝 Explanation

Secondary structure refers to the regular, repeated local spatial conformations of the polypeptide backbone, stabilized by hydrogen bonds between backbone atoms. The primary structure is the sequence, tertiary is the overall 3D fold of one chain, and quaternary is multi-subunit assembly.

📖 Additional Information

  • The linear sequence of amino acids in the polypeptide chain
  • The folding driven by interactions between R-groups
  • Localized folding patterns like α-helices and β-pleated sheets
  • The association of multiple polypeptide subunits

Secondary structure refers to the regular, repeated local spatial conformations of the polypeptide backbone, stabilized by hydrogen bonds between backbone atoms. The primary structure is the sequence, tertiary is the overall 3D fold of one chain, and quaternary is multi-subunit assembly.

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