Antibodies having enzymatic activity are called

Options

A. Ribozymes
B. Abzymes
C. Enzymes
D. All the above

Answer

To solve the question "Antibodies having enzymatic activity are called," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a specific term that describes antibodies which possess enzymatic activity.

2. **Analyzing the Options**:
- **Option A: Ribozymes**:
- Ribozymes are RNA molecules that have catalytic activity. They are not antibodies; rather, they are involved in biochemical reactions as catalysts. Therefore, this option is incorrect.

- **Option B: Abzymes**:
- Abzymes are indeed antibodies that have been engineered or naturally possess enzymatic activity. They are monoclonal antibodies that can catalyze chemical reactions. This option is correct.

- **Option C: Enzymes**:
- Enzymes are proteins that catalyze biochemical reactions, but they are not antibodies. Thus, this option is also incorrect.

- **Option D: All of the above**:
- Since only one of the options (abzymes) is correct, this option is incorrect as well.

3. **Conclusion**: After analyzing all options, the correct answer to the question is **Option B: Abzymes**.

### Final Answer:
Antibodies having enzymatic activity are called **abzymes**.

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