Question
Proteins are found to have two different types of secondary structures viz. $$\alpha $$ - helix and $$\beta $$ - pleated sheet structure. $$\alpha $$ - helix structure of protein is stabilised by
A.
peptide bonds
B.
van der Waalsforces
C.
hydrogen bonds
D.
dipole-dipole interactions
Answer :
hydrogen bonds
Solution :
$$\alpha $$ - Helix structure of protein is stabilised by hydrogen bonds between $$-NH-$$ group of one amino acid residue and the
group of another amino acid residue.
$$\alpha $$ - Helix structure of protein is stabilised by hydrogen bonds between $$-NH-$$ group of one amino acid residue and the
group of another amino acid residue. 
