Outermost living limit of a plant cell is

Options

A. Cell wall
B. Plasma membrane
C. Cytoplasm
D. Tonoplast

Answer

To determine the outermost living limit of a plant cell, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures of a Plant Cell**:
- A plant cell has several layers, starting from the outermost layer to the innermost components. The main structures include the cell wall, plasma membrane, cytoplasm, and vacuoles.

2. **Understand the Function of the Cell Wall**:
- The cell wall is the outermost layer of the plant cell. It provides structural support and protection. However, it is important to note that the cell wall is a non-living structure.

3. **Identify the Next Layer - Plasma Membrane**:
- Beneath the cell wall is the plasma membrane (also known as the cell membrane). The plasma membrane is a living structure that surrounds the cytoplasm of the cell.

4. **Clarify the Living Limit**:
- Since the question specifically asks for the "outermost living limit," we must focus on living structures. The cell wall is non-living, so we move to the next layer, which is the plasma membrane.

5. **Conclusion**:
- The plasma membrane is the outermost living limit of a plant cell. It is responsible for protecting the cell and regulating the movement of substances in and out of the cell.

### Final Answer:
The outermost living limit of a plant cell is the **plasma membrane**.

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