Which of the following statements correctly describe the prominent secondary structural motifs found — Biomolecules Chemistry Question

💡 Solution & Explanation

The $\alpha$ -helix is stabilized by intramolecular H-bonds, forming a coil with $\approx 3.6$ residues per turn. The $\beta$ -pleated sheet is stabilized by intermolecular H-bonds between adjacent stretched chains. Fibroin (silk protein) strictly possesses a $\beta$ -pleated sheet structure, not an $\alpha$ -helix.