JEE Main Chemistry question

[OJEE 2008] Helical structure of protein is stabilised by

(A)Peptide bond
(B)Hydrogen bondCorrect
(C)Van der Waal's force
(D)Dipole association

Answer: (B)

Solution

The α-helical secondary structure is held in its coiled shape by regular intramolecular hydrogen bonds formed between the N–H of one peptide unit and the C=O of another peptide unit three or four residues away along the backbone. The peptide bond itself

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Question ID VK-150647