NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
Catalase and peroxidase are enzymes that catalyse the breakdown of...
Catalase and peroxidase are enzymes that catalyse the breakdown of hydrogen peroxide into water and oxygen. Which of the following acts as a tightly bound prosthetic group for these enzymes?
Options
- AZinc
- BNiacin
- CHaem
- DNAD
Correct answer
C. Haem
Step-by-step solution
Catalase and peroxidase are enzymes that catalyse the breakdown of hydrogen peroxide into water and oxygen.
These enzymes require a non-protein part for their catalytic activity. Haem is the prosthetic group present in both catalase and peroxidase.
A prosthetic group is a tightly bound non-protein component of an enzyme. In this case, the haem group contains iron, which is essential for the enzymatic breakdown of hydrogen peroxide.
Answer: Haem
These enzymes require a non-protein part for their catalytic activity. Haem is the prosthetic group present in both catalase and peroxidase.
A prosthetic group is a tightly bound non-protein component of an enzyme. In this case, the haem group contains iron, which is essential for the enzymatic breakdown of hydrogen peroxide.
Answer: Haem