Transcript The Ultrastructure Of A Typical Bacterial Cell

The Ultrastructure Of A
Typical Bacterial Cell
By Luke Jones
The Bacterial Cell

This is a diagram
of a typical
bacterial cell,
displaying all of
it’s organelle.
The Bacterial Cell

This is what a
bacterial cell
looks like under
an electron
microscope.
Next- The Organelle and their
functions
P.T.O
Bacterial Cell Wall
Made from the Glycoprotein murein.
 Its purpose is to provide the cell with
strength and rigidity.
 It is permeable to solutes.

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.

Genetic material
The prokaryotic Bacterial cell has no
nucleus.
 Its genetic material and D.NA are contained
in a nucleoid.

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.

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.

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.

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.

GOOD BYE!

The excitement
must have
reached feverpitch!