Secondary structure of proteins refers to

Options

A. mainly denatured protein and structure of prosthetic groups
B. three dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain
C. Linear sequence of amino acid residue in a polypeptide chain
D. Regular folding patterns of continuous protions of the polypeptide chains.

Answer

D

Explanation

The secondary structure proteins refers to regular folding patterns of contiguous portions of the polypeptide chain.