Question: 131. Which one of the following enzymes contains ‘Haem’ as the prosthetic group?
(1) RuBisCo
(2) Carbonic anhydrase
(3) Succinate dehydrogenase
(4) Catalase
Answer: Option (4)
Explanation:
A prosthetic group is a non-protein component that is tightly bound to an enzyme and is essential for its activity.
Catalase is a heme-containing enzyme that catalyzes the breakdown of hydrogen peroxide into water and oxygen.
The heme group in catalase contains iron, which plays a crucial role in the redox reaction involved in this process.
RuBisCo does not contain heme; it uses magnesium as a cofactor.
Carbonic anhydrase contains zinc as its prosthetic group.
Succinate dehydrogenase contains flavin adenine dinucleotide and iron-sulfur proteins, not heme as the primary prosthetic group.
Therefore, the enzyme containing heme as a prosthetic group is catalase.