Question

The primary structure of a protein is due to

• A. Hydrogen bonds
• B. Peptide bonds
• C. –S-S- linkages
• D. Ionic bonds

Answer 1

The correct option is B

Peptide bonds

The correct option is option (B):

Explanation of the correct option:

1. The sequential arrangement of amino acid is called primary structure of protein.
2. In the primary structure, amino acids are arranged as a linear polypeptide chain.
3. The adjacent amino acids are bonded by peptide bond.

Explanation of the incorrect option:

Option (A):

Hydrogen bonding help in the formation of secondary structures in proteins.

Option (C):

Disulphide bonds (–S-S- linkages) contribute to the secondary and tertiary structure of proteins.

Option D:

Ionic bonds contribute to the tertiary and quaternary structure of proteins.

Final answer: The primary structure of the protein is due to peptide bonds.