Ncert Exercises & Solutions

Explain the terms primary and secondary structure of proteins. What is the difference between the -helix and -pleated sheet structure of proteins?

The primary structure of proteins Proteins consists of one or more polypeptide chains. Each polypeptide is a protein that contains amino acids joined with each other in a specific sequence. Secondary structure of proteins It refers to the shape in which a long polypeptide chain can exist.

$α$ -helix structure	$β$ -pleated sheet structure
A structure of twisting of all a polypeptide chain formed by possible H-bonds into a right-handed screw (helix) with the NH group of each amino acid, and residue hydrogen-bonded to the-C0-of an adjacent turn of the helix., Hence, called $α$ -helix by	All peptide chains are stretched out to nearly maximum extension and then laid side by side which is held together by intermolecular hydrogen bonds. This structure resembles the pleated folds of the drapery. Hence, called $β$ -pleated sheet structure.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions