In the secondary structure of a protein, the polypeptide chain is coiled into a spiral. Which bond is exclusively responsible for this helical shape?
Q1. In the secondary structure of a protein, the polypeptide chain is coiled into a spiral. Which bond is exclusively responsible for this helical shape?
Answer: Hydrogen bonds
Explanation: Hydrogen bonds between the C=O and N-H groups maintain the alpha-helix. Disulphide bridges are tempting but they primarily stabilize the tertiary folding.