. The secondary structure of a protein refers to


A: helical backbone

B: hydrophobic interactions

C: sequence of amino acids

D: fixed configuration of the polypeptide backbone

Best Answer

Explanation:

The secondary structure of a protein refers to the helical backbone which is formed by formation of intramolecular H-bonds( in Alpha pleated sheets) or intermolecular H-bonds(in Beta pleated sheets) which are hydrophilic interaction. 

     polypeptide              

Hydrophobic interactions occur in tertiary structure of a protein. 

Primary structure of a protein tells about the sequence of amino acids present in it. 

 

Correct Option is: (A)

helical backbone

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