The Ultrastructure Of A Typical Bacterial Cell

1. The Ultrastructure Of A Typical Bacterial Cell By Luke Jones

2. The Bacterial Cell • This is a diagram of a typical bacterial cell, displaying all of it’s organelle.

3. The Bacterial Cell • This is what a bacterial cell looks like under an electron microscope.

4. Next- The Organelle and their functions P.T.O

5. Bacterial Cell Wall • Made from the Glycoprotein murein. • Its purpose is to provide the cell with strength and rigidity. • It is permeable to solutes.

6. Cell Membrane • This is made from phospholipids, proteins and carbohydrates, forming a fluid-mosaic. • It surrounds the bacteria and is its most important organelle. • It is controls the movement of substances in and out of the cell.

7. Genetic material • The prokaryotic Bacterial cell has no nucleus. • Its genetic material and D.NA are contained in a nucleoid.

8. Ribosomes • These are the smallest and most numerous of cell organelle. • Their purpose is protein synthesis for the cells own use. • They consist of protein and RNA. • They are located either free in the cytoplasm of attached to the RER.

9. Flagellum • This is a rigid rotating tail. • It’s purpose is to propel the cell. • Clockwise rotation is what propels the cell forward, anticlockwise rotation causes a chaotic spin. • The rotation is powered by a H+ gradient across the cell membrane.

10. Plasmid • A plasmid is a small circle of DNA. • Bacterial cells have a number of plasmids. • Plasmids are used to exchange DNA between bacterial cells.

11. Capsule • This is a kind of slime layer covering the outside of the cell wall. • It is composed of a thick polysaccharide. • It is used to stick cells together and as a food reserve. • It is also there to protect the cell from desiccation, and from chemicals.

12. GOOD BYE! • The excitement must have reached fever-pitch!