The inorganic catalyst attached to enzymes is called :

Options

A. apoenzyme
B. lysozyme
C. activator
D. inhibitor

Explanation

To solve the question "The inorganic catalyst attached to enzymes is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**:
The question asks for the term that describes an inorganic catalyst that is associated with enzymes.

2. **Identify the Options**:
The options provided are:
- Option 1: Epoenzyme
- Option 2: Lysozyme
- Option 3: Activator
- Option 4: Inhibitor

3. **Analyze Each Option**:
- **Option 1: Epoenzyme**: This refers to the protein part of an enzyme that is inactive without its cofactor. It becomes active when it binds to a cofactor, forming a holoenzyme. Therefore, this is not the correct answer.

- **Option 2: Lysozyme**: This is an enzyme that has antimicrobial properties and is found in bodily fluids. It is not an inorganic catalyst, so this option is also incorrect.

- **Option 3: Activator**: An activator is an inorganic catalyst that binds to enzymes and increases their activity. This matches the description given in the question, making it the correct option.

- **Option 4: Inhibitor**: Inhibitors are substances that decrease enzyme activity by binding to the enzyme, preventing substrate binding. This does not fit the description of an inorganic catalyst.

4. **Conclusion**:
Based on the analysis, the correct answer to the question is **Option 3: Activator**.

### Final Answer:
The inorganic catalyst attached to enzymes is called **Activator**.

---