Which of the following enzymes is not protein?

Options

A. Ribozyme
B. Polymerase
C. Ligase
D. Lysozyme

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which of the following enzymes is not a protein. To answer this, we need to evaluate the options provided.

2. **Identifying the Options**: We need to analyze each enzyme mentioned in the options to determine whether it is a protein or not.

3. **Analyzing Ribozyme**:
- Ribozyme is an enzyme that is made of RNA (ribonucleic acid) and is capable of catalyzing biochemical reactions.
- Since ribozymes are composed of RNA and not proteins, we can conclude that ribozyme is not a protein.

4. **Analyzing Polymerase**:
- Polymerase is an enzyme that synthesizes long chains or polymers of nucleic acids.
- It is a protein that plays a crucial role in DNA replication and RNA transcription.

5. **Analyzing Ligase**:
- Ligase is an enzyme that facilitates the joining of DNA strands together by forming phosphodiester bonds.
- Like polymerase, ligase is also a protein.

6. **Analyzing Lysozyme**:
- Lysozyme is an enzyme found in various body fluids, including saliva, and it acts as an antimicrobial agent.
- Lysozyme is a protein that breaks down bacterial cell walls.

7. **Conclusion**: Based on the analysis, the only enzyme listed that is not a protein is ribozyme. Therefore, the correct answer is ribozyme.

**Final Answer**: Ribozyme is the enzyme that is not a protein.

---