Common cell wall material in primary wall, secondary wall and middle lamellum is

Options

A. Cellulose
B. Suberin
C. Pectin
D. Lignin

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the common cell wall material found in the primary wall, secondary wall, and middle lamella of plant cells.

2. **Identifying the Layers**:
- **Primary Wall**: This is the first layer formed during cell division. It is flexible and allows for cell growth.
- **Middle Lamella**: This layer acts as a cementing layer between the primary walls of adjacent cells, helping to hold them together.
- **Secondary Wall**: This layer is formed after the primary wall and middle lamella, providing additional strength and rigidity to the cell.

3. **Analyzing the Composition of Each Layer**:
- **Primary Wall**: Mainly composed of cellulose, hemicellulose, and glycoproteins.
- **Middle Lamella**: Primarily made up of pectin, which acts as a glue between cells.
- **Secondary Wall**: Composed of cellulose, lignin, and hemicellulose.

4. **Finding the Common Material**:
- The question specifically asks for a material that is present in all three layers.
- While the primary wall contains cellulose, the middle lamella has pectin, and the secondary wall has cellulose as well.

5. **Conclusion**: The common material found in the primary wall, secondary wall, and middle lamella is **cellulose**.

### Final Answer:
The common cell wall material in the primary wall, secondary wall, and middle lamella is **cellulose**.

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