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Secondary structure of proteins refers t...

Secondary structure of proteins refers to

A

`alpha`-helical backbone

B

hydrophobic interactions

C

sequence of `alpha-`amino acids.

D

fixed configuration of the polypeptide backbone.

Text Solution

Verified by Experts

The correct Answer is:
D
Secondary structure of proteins is mainly of two types
(i) `alpha-` helix : This structure is formed when the chain of `alpha-` amino acids coils as right handed screw (called `alpha-` helix) because of the formation of the hydrogen bonds between amide group of the same peptide chain.
(ii) `beta-` plates 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.
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