Green algae have cell wall made up of -

Options

A. Outer layer of pectose and inner layer of cellulose
B. Inner layer of pectose and outer layer of cell wall
C. Cellulose + Algin
D. Cellulose + Peptidoglycan

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Green Algae:**
Green algae are a group of photosynthetic organisms that possess chlorophyll. They can exist in various forms, including unicellular, colonial, or filamentous structures.

2. **Identifying the Components of the Cell Wall:**
The cell wall of green algae is known to be rigid. It consists of two main layers:
- An **outer layer of pectose**
- An **inner layer of cellulose**

3. **Excluding Other Options:**
- **Cellulose plus algin**: Algin is found in brown algae, not in green algae.
- **Cellulose plus peptidoglycan**: Peptidoglycan is a component of bacterial cell walls and not found in algae.
- **Inner layer of pectose and outer layer of cellulose**: This is incorrect as the outer layer is pectose and the inner layer is cellulose.

4. **Conclusion:**
Based on the structure of the cell wall and the components identified, the correct answer is that green algae have a cell wall made up of an outer layer of pectose and an inner layer of cellulose.

**Final Answer:**
Green algae have a cell wall made up of an outer layer of pectose and an inner layer of cellulose.

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