In Cockroach enzymes cellulase is produced by

Options

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

Answer

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

### Step-by-Step Solution:

1. **Understanding Cellulase**:
- Cellulase is an enzyme that catalyzes the breakdown of cellulose into simpler sugars, which can then be used for energy.

2. **Identifying the Sources of Cellulase in Cockroaches**:
- In cockroaches, cellulase is produced in two main locations: the salivary glands and the midgut.

3. **Evaluating the Options**:
- **Option 1: Saliva**: While cellulase is present in the salivary glands, this option is too narrow as it does not consider the midgut.
- **Option 2: Lining cells of midgut**: The lining cells primarily function in nutrient absorption and do not produce cellulase.
- **Option 3: Bacteria in midgut**: This is a correct option because the bacteria present in the midgut of cockroaches help in the digestion of cellulose by producing cellulase.
- **Option 4: Cellulose is not metabolized**: This statement is incorrect as some wood-eating species of cockroaches do metabolize cellulose for energy.

4. **Conclusion**:
- The correct answer is **Option 3: Bacteria in midgut**, as these bacteria produce cellulase which aids in the digestion of cellulose.