Shapes of Bacteria
Shapes of Bacteria 1. Coccus/Cocci
Shapes of Bacteria 2. Bacillus/Bacilli
Shapes of Bacteria 3. Spiral
Structure of the bacterial cell
Feature
Cell Wall
Function
Protects the cell and gives it strength.
Plasma
Membrane
Controls movement of material into and out of the
cell. Gram negative bacteria have 2 plasma
membrane, gram positive have 1.
Cytoplasm
Nutrient rich jelly where cellular reactions occur.
Ribosome
Make proteins. (responsible for structure, function
and regulations of the cell).
Nucleoid
Region of cytoplasm that contains the DNA in 1 or 2
ring shaped chromosomes.
Feature
Capsule/slime
layer
Pilus (Pili)
Flagellum
(Flagella)
Plasmid
Endospore
Function
Protect the cell from dehydration and antibiotics.
Hairs on the cell used for adhesion or DNA transfer.
Large ‘tails’ on the cell used for locomotion.
Smaller separate rings of self-replicating DNA.
A dormant, tough, ‘clone’ of the cell that allows it to
lie dormant. Some have been revived after 10,000
years.