Non-protein organic component of enzyme is

Options

A. Apoenzyme
B. Holoenzyme
C. Coenzyme
D. Isoenzymes.

Answer

To answer the question "What is the non-protein organic component of an enzyme?", we can break down the concepts related to enzymes and their components step by step.

### Step-by-Step Solution:

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up biochemical reactions. They are primarily proteins.

2. **Components of Enzymes**: Enzymes can have different components:
- **Apoenzyme**: This is the protein part of the enzyme that is inactive on its own.
- **Cofactor**: This is a non-protein component that is necessary for the enzyme's activity. Cofactors can be metal ions or organic molecules.

3. **Types of Cofactors**:
- **Coenzymes**: These are organic cofactors that are loosely attached to the apoenzyme. They assist in the enzyme's function by participating in the reaction.
- **Prosthetic Groups**: These are tightly bound cofactors that are also essential for the enzyme's activity.

4. **Identifying the Non-Protein Organic Component**: Since the question specifically asks for a non-protein organic component, we focus on coenzymes, which are organic molecules that assist enzymes in catalyzing reactions.

5. **Conclusion**: The correct answer to the question is **coenzyme**, as it is the non-protein organic component of an enzyme.

### Final Answer:
The non-protein organic component of an enzyme is **coenzyme**.

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