What is the outermost layer of cell envelope in prokaryotic?

Options

A. Cell Wall
B. Glycocalyx
C. Plasma membrane
D. Mesosomes

Answer

To determine the outermost layer of the cell envelope in prokaryotic cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Prokaryotic Cell Structure**: Prokaryotic cells have a specific structure that includes a cell envelope composed of multiple layers.

2. **Identify the Layers of the Cell Envelope**: The cell envelope of prokaryotic cells typically consists of three main layers:
- The outermost layer
- The middle layer
- The innermost layer

3. **Name the Layers**:
- The **outermost layer** is known as the **Glycocalyx**.
- The **middle layer** is the **cell wall**.
- The **innermost layer** is the **plasma membrane**.

4. **Determine the Function of Each Layer**: The cell envelope is crucial for the protection of the cell, and each layer plays a role in this function.

5. **Conclude with the Correct Answer**: Since the question specifically asks for the outermost layer, the answer is the **Glycocalyx**.

### Final Answer:
The outermost layer of the cell envelope in prokaryotic cells is the **Glycocalyx**.

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