Select the correctly matched option :

Options

A. Simple enzyme - Protein and non-protein part
B. Apoenzyme - Non-protein part
C. Co-factor -Protein part
D. Prosthetic group - Haem group in catalase

Answer

To solve the question "Select the correctly matched option," we need to analyze each of the provided options regarding enzymes, apoenzymes, cofactors, and prosthetic groups. Here’s a step-by-step breakdown:

### Step 1: Understand the Definitions
- **Enzymes**: These are biological catalysts that are primarily proteins. They speed up chemical reactions in living organisms.
- **Apoenzyme**: This is the protein part of an enzyme that is inactive until it binds with a cofactor.
- **Cofactor**: This is a non-protein molecule that assists enzymes in catalyzing reactions. It can be an inorganic ion or a coenzyme (organic molecule).
- **Prosthetic Group**: This is a non-polypeptide unit that is tightly and permanently attached to a protein, often playing a crucial role in the protein's function.

### Step 2: Analyze Each Option
1. **Simple Enzyme as Non-Protein Part**: This is incorrect because simple enzymes are proteins.
2. **Apoenzyme as Non-Protein Part**: This is also incorrect because apoenzymes are proteins that require cofactors to become active.
3. **Cofactor as Protein Part**: This is incorrect because cofactors are non-protein molecules.
4. **Prosthetic Group as Heme Group in Catalase**: This is correct. The heme group is a prosthetic group that contains iron and is involved in the function of catalase.

### Step 3: Conclusion
The only correctly matched option is the prosthetic group that is the heme group in catalase.

### Final Answer
The correct option is: **Prosthetic group as Heme group in Catalase.**

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