The bactericidal protein present in human tears is

Options

A. Transducin
B. Lysozyme
C. Opsin
D. Retinene

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the bactericidal protein present in human tears.

2. **Review the Options**: The options provided are:
- A) Transducin
- B) Lysozyme
- C) Opsin
- D) Retinine

3. **Analyze Each Option**:
- **Transducin**: This is a protein found in the photoreceptor cells of the retina and is involved in visual phototransduction. It does not have bactericidal properties.
- **Opsin**: Similar to transducin, opsin is also a protein found in photoreceptor cells and is involved in converting light into electrical signals. It is not related to bactericidal activity.
- **Retinine**: This is a derivative of vitamin A and is also present in photoreceptor cells. It does not have any bactericidal function.
- **Lysozyme**: This is an enzyme found in various secretions, including tears and saliva. Lysozyme has antimicrobial properties, specifically bactericidal properties, as it cleaves the peptidoglycan layer of bacterial cell walls.

4. **Conclusion**: Based on the analysis, the only option that is a bactericidal protein present in human tears is **Lysozyme**.

5. **Final Answer**: The bactericidal protein present in human tears is **B) Lysozyme**.

---