question_answer

Which type of interactions are responsible for making the a-helix structure stable?

A) Peptide bonds between \[-N{{H}_{2}}\] and \[CO\] groups of adjacent carbon chains.

B) Hydrogen bonds between —NH of amino acid in one turn with —CO of amino acid to adjacent turn.

C) —OH group of one amino acid with —CO group of other amino acid on the turn.

D) Hydrogen bonds between adjacent amino acids.

Correct Answer: B

Solution :

In \[\alpha \]-helix, a polypeptide chain is stabilised by the formation of hydrogen bonds between \[NH\] group of amino acids in one turn with group of amino acids belonging to adjacent then.