Question

What is a prosthetic group of a protein?

• A. Amino acid
• B. Peptide chain
• C. Polypeptide chain
• D. Non-protein component

Answer 1

The correct option is D Non-protein component

Prosthetic groups are cofactors that bind tightly to proteins or enzymes. It is a specific non-polypeptide required for the biological function of some proteins. The prosthetic group may be organic (such as vitamin, sugar or lipid) or inorganic (such as metal ion), but is not composed of amino acids.