Biomolecules Ques 27
27. The helical structure of protein is stabilized by
[2004]
(a) dipeptide bonds
(b) hydrogen bonds
(c) ether bonds
(d) peptide bonds
Show Answer
Solution:
- (b) Hydrogen bonding between different units is responsible for holding helix in a position. $NH$ group in one unit is linked to carbonyl oxygen of the third unit by hydrogen bonding.
The $\alpha$-helix structure is formed when the chain of $\alpha$-amino acids coils as a right handed screw (called a-helix) because of the formation of hydrogen bonds between amide groups of the same peptide chain.
BETA
