What is the outermost layer of cell envelope in prokaryotic?

Options

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

Answer

To answer the question "What is the outermost layer of the cell envelope in prokaryotic cells?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Prokaryotic Cells**:
Prokaryotic cells, such as bacteria, have a cell envelope that consists of multiple layers.

2. **Identify the Layers of the Cell Envelope**:
The cell envelope in prokaryotic cells typically consists of three main components:
- Glycocalyx
- Cell wall
- Plasma membrane

3. **Determine the Outermost Layer**:
Among these layers, the glycocalyx is the outermost layer. It is a gelatinous layer that surrounds the cell wall and is involved in protection and adherence.

4. **Clarify the Position of Other Layers**:
- The cell wall lies beneath the glycocalyx.
- The plasma membrane is the innermost layer, located beneath the cell wall.

5. **Conclude the Answer**:
Therefore, the outermost layer of the cell envelope in prokaryotic cells is the **glycocalyx**.

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

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