A prokaryotic cell is a simple, single-celled organism that lacks a nucleus and other membrane-bound organelles. Here is a diagram of a typical prokaryotic cell:

_____________________
| |
| Cell Wall |
|_______________________|
| |
| Cell Membrane |
|_______________________|
| |
| Cytoplasm |
|_______________________|
| |
| Nucleoid |
|_______________________|
| |
| Ribosomes |
|_______________________|
| |
| Plasmids |
|_______________________|
| |
| Flagella |
|_______________________|

1. Cell Wall: A rigid outer layer that provides structure and protection to the cell.

2. Cell Membrane: A thin, flexible barrier that surrounds the cytoplasm and regulates the passage of substances in and out of the cell.

3. Cytoplasm: A gel-like substance that fills the cell and contains various cellular components.

4. Nucleoid: The region where the genetic material, usually a circular DNA molecule, is located. It is not enclosed by a nuclear membrane.

5. Ribosomes: Structures responsible for protein synthesis. They are scattered throughout the cytoplasm.

6. Plasmids: Small, circular pieces of DNA that can be found in some prokaryotic cells. They contain additional genetic information and can be transferred between cells.

7. Flagella: Long, whip-like structures that allow the cell to move.

It is important to note that prokaryotic cells can vary in shape and size, so the diagram above represents a generalized prokaryotic cell.