In which class, the cell wall possesses pectin and polysulphate esters beside the cellulose ?

Options

A. Chlorophyceae
B. Phaeophyceae
C. Rhodophyceae
D. All of the above

Answer

To determine in which class the cell wall possesses pectin and polysulphate esters alongside cellulose, we can analyze the options provided:

1. **Understanding the Classes**:
- **Chlorophyceae**: Commonly known as green algae, their cell walls are primarily composed of cellulose.
- **Pheophyceae**: Known as brown algae, they also have cell walls that contain cellulose and pectin.
- **Rhodophyceae**: Known as red algae, their cell walls are unique because they contain pectin and polysulphate esters in addition to cellulose.

2. **Analyzing the Options**:
- **Option A (Chlorophyceae)**: This is incorrect because their cell walls are mainly made of cellulose, without polysulphate esters.
- **Option B (Pheophyceae)**: This is also incorrect as their cell walls contain cellulose and pectin, but not polysulphate esters.
- **Option C (Rhodophyceae)**: This is the correct answer because red algae have cell walls that include both pectin and polysulphate esters alongside cellulose.
- **Option D (All of the above)**: This is incorrect since not all classes possess both pectin and polysulphate esters.

3. **Conclusion**:
- The correct answer is **Option C: Rhodophyceae**.