NEETBotanyBiomolecules (B)
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In the enzyme catalase, haem is classified as a prosthetic group. Reason (R): Prosthetic groups are organic compounds that are tightly bound to the apoenzyme. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is correct because haem is indeed the prosthetic group in the enzyme catalase, which catalyses the breakdown of hydrogen peroxide. Reason (R) is correct because prosthetic groups are distinguished from other cofactors (like coenzymes) by the fact that they are tightly bound to the apoenzyme. This tight binding is exactly why haem is classified as a prosthetic group. Therefore, both (A) and (R) are correct and (R) is the correct explanation of (A). Answer: Both (A) and (R) are correct and (R) is the co