Question
Question: The secondary structure of protein refers to:...
The secondary structure of protein refers to:
A
α -helical backbone.
B
Hydrophobic interactions.
C
Sequence of a-amino acids.
D
Fixed configuration of the polypeptide backbone.
Answer
Fixed configuration of the polypeptide backbone.
Explanation
Solution
Secondary structure of proteins is mainly of two types.
(i) α -helix : This structure is formed when the chain of a-amino acid coils as a right handed screw (called α - helix) becaues of the formation of the hydrogen bonds between amide group of the same peptide chain.
(ii) β - plated sheet : In this structure the chains are held together by a very large number of hydrogen bonds between
C = O and NH of different chains.