The first wall layer of cell is

Options

A. Tertiary wall, if present
B. Secondary wall
C. Primary wall
D. Middle lamella , if present

Answer

To answer the question "The first wall layer of cell is," we can follow these steps:

### Step 1: Understand the Structure of the Cell Wall
The cell wall is a rigid outer layer that surrounds the cell membrane in plant cells. It provides structure, support, and protection to the cell.

### Step 2: Identify the Layers of the Cell Wall
The cell wall consists of several layers:
- **Primary Cell Wall**: This is the first and outermost layer of the cell wall. It is flexible and allows for cell growth.
- **Secondary Cell Wall**: This layer is formed after the primary wall and provides additional strength and rigidity.
- **Middle Lamella**: This layer is a thin layer that cements adjacent plant cells together and is rich in pectin.

### Step 3: Determine the First Wall Layer
Among the options provided:
- A. Tertiary wall if present
- B. Secondary wall
- C. Primary wall
- D. Middle lamella if present

The first wall layer of a cell is the **Primary Wall**.

### Conclusion
Thus, the correct answer to the question is **C. Primary wall**.

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