In Cockroach enzymes cellulase is produced by

Options

A. Saliva
B. Lining cells of midgut
C. Bacteria in midgut
D. Cellulose is not metabolised.

Answer

To answer the question "In Cockroach enzymes cellulase is produced by," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Enzymes in Cockroaches**:
- Cockroaches have various enzymes that aid in digestion. It's important to know what these enzymes are and where they are produced.

2. **Identify the Source of Cellulase**:
- Cellulase is an enzyme that breaks down cellulose. In cockroaches, this enzyme is not produced by the cockroach itself but rather by microorganisms.

3. **Evaluate the Options**:
- **Option A: Saliva** - While saliva contains enzymes like amylase and chitinase, it does not produce cellulase.
- **Option B: Lining cells of midgut** - The lining cells of the midgut do not produce cellulase.
- **Option C: Bacteria in the midgut** - This is the correct option, as certain bacteria present in the midgut of cockroaches produce cellulase.
- **Option D: Cellulose is not metabolized in cockroach** - This is incorrect because cockroaches can digest cellulose with the help of cellulase.

4. **Conclusion**:
- Based on the evaluation of the options, the correct answer is that cellulase is produced by **bacteria in the midgut** of the cockroach.

### Final Answer:
**C: Bacteria in the midgut**

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