Correct sequence of layer of bacerial cell envelope from outward to inward is

Options

A. Cell wall `rarr` Glycocalyx `rarr` Cell wall
B. Cell membrane `rarr` Glycocalyx `rarr` Cell wall
C. Glycocalyx `rarr` Cell wall `rarr` Cell membrane
D. Glycocalyx `rarr` membrane `rarr` Cell well.

Explanation

To determine the correct sequence of layers of the bacterial cell envelope from outward to inward, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Layers of the Bacterial Cell Envelope**:
- The bacterial cell envelope consists of three main layers: glycocalyx, cell wall, and cell membrane.

2. **Understand the Function and Structure of Each Layer**:
- **Glycocalyx**: This is the outermost layer. It can exist in two forms:
- **Slime Layer**: A loose, protective layer found in non-pathogenic bacteria.
- **Capsule**: A thicker, more rigid layer found in pathogenic bacteria.
- **Cell Wall**: This layer provides structure and protection to the bacterial cell. It is located beneath the glycocalyx.
- **Cell Membrane (Plasma Membrane)**: This is the innermost layer that surrounds the cytoplasm of the cell and regulates the entry and exit of substances.

3. **Arrange the Layers from Outward to Inward**:
- Starting from the outermost layer, the sequence is:
- **Glycocalyx** (outermost)
- **Cell Wall** (middle layer)
- **Cell Membrane** (innermost)

4. **Final Sequence**:
- Therefore, the correct sequence of the layers of the bacterial cell envelope from outward to inward is:
- **Glycocalyx → Cell Wall → Cell Membrane**.

### Conclusion:
The correct answer is option C: Glycocalyx, Cell Wall, Cell Membrane.

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