Cell wall of Spirogyra is composed of

Options

A. Peptidoglycan
B. Pectin
C. Cellulose
D. Both (2) & (3)

Answer

To determine the composition of the cell wall of Spirogyra, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**:
- Spirogyra is a type of green alga classified under the class Chlorophyceae.

2. **Understand Cell Wall Structure**:
- The cell wall of Spirogyra consists of two distinct layers:
- **Outermost Layer**: This layer is primarily composed of pectin.
- **Innermost Layer**: This layer is made up of cellulose.

3. **Functions of Components**:
- **Pectin**:
- Provides adhesive properties to the cell wall.
- Contributes to the porous nature of the cell wall.
- **Cellulose**:
- Provides mechanical strength and tensile strength to the organism.
- Helps protect Spirogyra from osmotic fluctuations.

4. **Analyze the Options**:
- Given the options:
- A) Peptidoglycan
- B) Pectin
- C) Cellulose
- D) Both 2 & 3 (Pectin and Cellulose)
- Since we established that the cell wall contains both pectin and cellulose, the correct answer is option D.

5. **Conclusion**:
- The cell wall of Spirogyra is composed of both pectin and cellulose, making the correct answer **D) Both 2 & 3**.