Lysozyme occurs in

Options

A. gastric juice
B. saliva
C. bile juice
D. (1) and (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Lysozyme**: Lysozyme is an enzyme that has antibacterial properties. It helps in breaking down the cell walls of bacteria, thus preventing infections.

2. **Identifying Sources of Lysozyme**: The question provides several options: gastric juice, saliva, bile juice, and both first and second. We need to determine where lysozyme is found among these options.

3. **Analyzing Gastric Juice**: Gastric juice is secreted by gastric glands located in the stomach. The primary components of gastric juice include hydrochloric acid and digestive enzymes like pepsin. However, lysozyme is not present in gastric juice.

4. **Analyzing Saliva**: Saliva is produced by salivary glands located in the mouth. It contains various components, including electrolytes and enzymes. Importantly, lysozyme is present in saliva and serves as an antibacterial agent.

5. **Analyzing Bile Juice**: Bile juice is produced by the liver and is primarily involved in the emulsification of fats. It does not contain lysozyme.

6. **Conclusion**: Based on the analysis, lysozyme is present in saliva. Therefore, the correct answer to the question is "saliva."

**Final Answer**: Lysozyme occurs in saliva.

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