The protein part of a conjugated enzyme is

Options

A. holoenzyme
B. conezymes
C. prothetic group
D. apoenzyme

Answer

To answer the question, "The protein part of a conjugated enzyme is," we need to understand the components of conjugated enzymes.

### Step-by-Step Solution:

1. **Definition of Conjugated Enzymes**: Conjugated enzymes are enzymes that consist of a protein part (apoenzyme) and a non-protein part (cofactor or prosthetic group). The non-protein part can be a metal ion or an organic molecule.

2. **Understanding the Components**:
- **Apoenzyme**: This is the protein part of the enzyme that requires a cofactor to be active. It is inactive on its own.
- **Cofactor**: This can be a metal ion or an organic molecule that assists in enzyme activity.
- **Prosthetic Group**: This is a type of cofactor that is tightly bound to the apoenzyme.
- **Holoenzyme**: This term refers to the complete, active enzyme that includes both the apoenzyme and its cofactor.

3. **Identifying the Correct Answer**: The question specifically asks for the protein part of the conjugated enzyme. According to the definitions:
- The protein part is referred to as the **apoenzyme**.

4. **Conclusion**: Therefore, the correct answer to the question is **Apoenzyme**.

### Final Answer:
The protein part of a conjugated enzyme is **Apoenzyme**.