Question

The helical structure of protein is stabilized by

• A. dipeptide bonds
• B. hydrogen bonds
• C. ether bonds
• D. peptide bonds

Answer 1

Answer: (B)

hydrogen bonds

Answer 2

The helical structure of protein is stabilized by hydrogen bonds between amide group of the same peptide chain. These bonds are formed by $-NH-$ group of one unit and oxygen of carbonyl group of the third unit. This $H-$ bonding is responsible for holding helix in a position.