Cell Wall in algae is made up of

Options

A. Cellulose and hemicellulose with minerals like calcium carbonate
B. Cellulose, galactans, mannans and minerals like calcium carbonate
C. Cellulose, galactose, pectin and minerals like magnesium carbonate
D. Celluloser, galactose, mannans and chitin

Answer

### Step-by-Step Solution:

1. **Understanding Algae**: Algae are a diverse group of photosynthetic organisms found in various aquatic environments. They possess a cell wall, which is crucial for their structure and protection.

2. **Components of the Cell Wall**: The cell wall of algae is primarily composed of several substances. The key components include:
- **Cellulose**: A polysaccharide that provides structural support.
- **Hemicellulose**: Another polysaccharide that works alongside cellulose to strengthen the cell wall.
- **Pectin**: A polysaccharide that helps in cell adhesion and provides flexibility.
- **Agar**: A gelatinous substance derived from certain algae, used in various applications.
- **Carrageenan**: A polysaccharide used for its gelling properties, derived from red algae.
- **Minerals**: Algal cell walls may also contain minerals such as calcium carbonate and magnesium carbonate, which contribute to their rigidity.

3. **Final Composition**: Based on the components mentioned, the cell wall in algae is made up of:
- **Cellulose**
- **Hemicellulose**
- **Pectin**
- **Agar**
- **Carrageenan**
- **Minerals (like calcium carbonate)**

4. **Conclusion**: Therefore, the main components of the cell wall in algae are cellulose, hemicellulose, and various polysaccharides, along with minerals such as calcium carbonate.