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what are the 3 things which differentiate bacteria types
size cell wall structure staining charecteristics
what does the genetic differences in bacteria produce
diff metabolic features diff surface mols so have different antigenic properties
what causes bacteria to have different antigenic properties
genetic differences - size, cell wall structure, staining charecteristics
whats the smallest type of bacteria known as
archaea 0.4um diameter
diameter of archaea bacteria
0.4 um
what does the size of smallest cell depend on
limited by the size of the molecules needed for life
whats the largest bacteria known
sulphur bacterium
diameter of the biggest known bacterium
sulphur bacterium 750 um
how many types of bacteria shapes are there
3
what are the 3 bacteria shapes
rod shaped spherical spiral
what type of bacteria is rod shaped
bacillus
what shape is bacillus
rod-shaped
what shape is coccus bacteria
sphercial
what type of bacteria is spherical shapped
coccus
what type of bacteria is spiral shaped
sprillum
what shape is spirllum bacteria
spiral
whats the actual like theory behind the gram stain
different staining properties are due to differences in the chemical compesition of their cell walls
after staining what colour is gram-positive bacteria
violet
after staining what colour is gram-negative bacteria
red
what type of gram bacteria is stained red
gram negative bacteria
what type of gram bacteria is stained violet
gram positive bacteria
whats the same in cell wall of all bacteria
3D network of polysaccharides and polypeptides (known as peptidoglycan)
whats the function of crosslinkages in the cell wall of wall bacteria
provides strength and gives the cell its shape
whats the function of the cell wall in bacteria
protects against swelling and bursting or lysis caused by the osmotic uptake of water