Abzyme is

Options

A. Antienzyme
B. Antigens
C. Enzyme-like antibody
D. Both A and B

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Abzyme":**
- An abzyme, also known as a catalytic antibody, is an antibody that has catalytic activity. This means it can accelerate chemical reactions, similar to enzymes.

2. **Identifying the Options:**
- The question provides four options to identify what an abzyme is:
1. Anti-enzymes
2. Antigens
3. Enzymes like antibodies
4. Both A and B

3. **Analyzing Each Option:**
- **Option 1: Anti-enzymes**
- Anti-enzymes are agents that inhibit the activity of enzymes. Since abzymes are not inhibitors but rather catalysts, this option is incorrect.

- **Option 2: Antigens**
- Antigens are substances that trigger an immune response, leading to the production of antibodies. They do not have catalytic properties, making this option incorrect as well.

- **Option 3: Enzymes like antibodies**
- This option is correct. Abzymes are indeed antibodies that have enzymatic activity, meaning they can catalyze reactions, similar to enzymes.

- **Option 4: Both A and B**
- Since both anti-enzymes and antigens are incorrect in the context of abzymes, this option is also incorrect.

4. **Conclusion:**
- Based on the analysis, the correct answer is **Option 3: Enzymes like antibodies**.