Apoenzyme and coenzyme collectively produce

Options

A. holoenzyme
B. enzyme-product complex
C. cofactor
D. prosthetic group

Answer

To answer the question "Apoenzyme and coenzyme collectively produce what?", we can break down the concepts involved:

### Step-by-Step Solution:

1. **Define Apoenzyme**:
- An apoenzyme is the protein part of an enzyme that is catalytically inactive on its own. It requires additional components to become active.

2. **Define Coenzyme**:
- A coenzyme is a non-protein organic molecule that assists the apoenzyme in becoming active. Coenzymes can often be separated from the apoenzyme and are essential for the enzyme's activity.

3. **Combine Apoenzyme and Coenzyme**:
- When an apoenzyme combines with its coenzyme, they form a complete and active enzyme. This active form of the enzyme is known as a **holoenzyme**.

4. **Understanding Holoenzyme**:
- A holoenzyme is a conjugated protein that consists of the apoenzyme and its coenzyme. It is the functional form of the enzyme that can catalyze biochemical reactions.

5. **Conclusion**:
- Therefore, the correct answer to the question is that apoenzyme and coenzyme collectively produce a **holoenzyme**.

### Final Answer:
Apoenzyme and coenzyme collectively produce a **holoenzyme**.