Flashcards in Introduction to bacteria Deck (22)
ways in which bacteria can be identified
bacteria contain one chromosome, no nucleus.
Cell walls of gram positive bacteria
thick peptidoglycan layer above.
cell walls of gram negative bacteria
plasma membrane, thin peptidoglycan layer, outer membrane, space in between the membranes called the periplasm, lipopolysaccharides embedded in outer membrane.
penicillin binding proteins
cross links: transpeptidases, carboxypeptidases, endopeptidases.
gives strength and shape to cells.
elicit strong immune responses in animals and humans
Mainly made of polysaccharides. prevents phagocytosis of the bacterial cell.
also prevents dessication of the cell
single flagellum on one side of the bacteria
many flagella on one side of the cell
one flagellum on each side of the bacterial cell
flagella all over bacterial cell
appendages of bacterial cells that allow adherence
extra rings of DNA used for horizontal transfer (conjugation)
virus that infects bacterial cells
structure a bacteria can form during environmental stress so the bacteria can survive. Contains a complete copy of the bacteria's DNA.
names are based on genus and species.
Genus is named according to appearance under microscope eg. staphylo- clusters
-coccus round shape
bacillus- rod shaped
stain purple, thick peptidoglycan layer in cell wall
stain pink, thin peptidoglycan layer in cell wall and contains lipopolysaccharides.
how bacteria replicate
binary fission to produce two identical progeny