Algae have cell wall made of -

Options

A. Cellulose, hemicellulose, pectins and protein
B. Cellulose, galactans, mannans and minerals like calcium carbonate
C. Chitin
D. Peptidoglycans

Answer

To answer the question "Algae have cell wall made of -", we can follow these steps:

### Step 1: Understand the Composition of Algal Cell Walls
Algal cell walls are primarily composed of various polysaccharides. The main components include cellulose, hemicellulose, and pectins.

### Step 2: Identify Specific Components
1. **Cellulose**: This is a major structural component of the cell wall in many algae.
2. **Hemicellulose**: This is a group of polysaccharides that provide additional structural support.
3. **Pectins**: These are complex carbohydrates that help in cell wall stability and structure.
4. **Galactanes and Mannans**: These are also polysaccharides found in the cell walls of certain types of algae.
5. **Minerals**: Algal cell walls may also contain minerals such as calcium and magnesium.

### Step 3: Conclusion
Based on the information gathered, the cell wall of algae is primarily made up of cellulose, galactanes, mannans, and minerals like calcium and magnesium.

### Final Answer
Algae have cell walls made of **cellulose, galactanes, mannans, and minerals like calcium carbonate**.

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