celldiagram.worldBiology · Cell Type
Prokaryotic Cell Diagram
A bacterial cell is prokaryotic: small, structurally simple and without a membrane-bound nucleus, but still capable of every process needed for life.
Interactive vector diagram — click a part, hide labels, or download a 300 DPI PNG / editable SVG.
Diagram labels and functions
| Structure / stage | Function |
|---|---|
| Capsule | Protective outer coating in many bacteria. |
| Cell wall | Maintains shape and prevents bursting. |
| Cell membrane | Controls exchange and hosts some reactions. |
| Nucleoid DNA | Main circular chromosome without a nuclear membrane. |
| Plasmid | Small extra ring of DNA. |
| 70S ribosomes | Build proteins in the cytoplasm. |
| Flagellum | Rotating structure used for movement. |
Parts of a bacterial cell diagram
The chromosome lies in a nucleoid region, while plasmids carry extra genes. Ribosomes build proteins and the membrane controls exchange. Many bacteria also have a capsule or flagellum.
Prokaryotic versus eukaryotic cells
Prokaryotes lack a nucleus and membrane-bound organelles. They are usually much smaller, and their ribosomes are 70S rather than 80S.
Related diagrams
Frequently Asked Questions
Is a bacteria cell diagram the same as a prokaryotic cell diagram?
Usually yes. Bacteria are the prokaryotes most often shown in school diagrams.
Where is DNA in a prokaryotic cell?
In the nucleoid region, with additional small DNA rings called plasmids in many bacteria.
Do bacteria have cell membranes?
Yes. They have a cell membrane inside the cell wall.
Search terms covered by this page
prokaryotic cell diagram · bacteria cell diagram · bacterial cell diagram · diagram of prokaryotic cell