Question

The secondary order of protein structure is 

(a) the sequence of amino acids in the polypeptide chain 

(b) the formation of peptide bonds between amino acids 

(c) the coiling of the polypeptide chain 

(d) the folding of the coiled polypeptide chain

Answer 1

Correct option is (c) the coiling of the polypeptide chain

The structures adopted by polypeptides can be divided into four levels of organisation, i.e., the primary, secondary, tertiary and quaternary structures. The secondary structure pertains to the coiling of the polypeptide chains into regular structure such as α-helices and β-pleated sheets.