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parts to Flagellum
1. Filament
. Hook
. Basal body
-flagellum doesn’t wip back and forth, it can rotate 60 degrees.
Flagella
- monotrichious - just one
- lophotrichious - small bunches from same part
- amphitrochious - flagella at both ends of bacteria
- peritricious- dispersed randomly over the surface of the cell
- bacteria with polar flagella are very speedy. Motility can be checked by putting bacteria under a microscope. Fast ones will move across the slide whereas slow ones will stay in one place.
Chemotaxis- a bacteria will move toward a good thing like chemicals such as food, and they will move away from bad things like toxic substances
- the flagella are responsible for the process of chemo taxis
- bacteria with fimbria adhere to their host causing the infection
-the gonococcus (gonorrhea) invades the genital urinary tract. E.Coli invades the intestine by these means.
- Pili are only on gram-negative bacteria and are involved in a mating process between cells so DNA is exchanged between the donor and recipient cell. Production of pili is controlled genetically.
- Spirochetes have internal flagella, Fimria have short
Micro map
Procaryatic cell
-Appendages - flagella, pili, fimrane
-Cell envelope - glycocolyx, capsule, slime layer, cell wall, cell membrane
-Protoplasm - cell pool, ribosomes, messosomes, granules, nucleud, chromatic bodies
Appendages Cell extentions
- appendages need something to stick to
- flagella and and axial filaments provide motility
- fimbraie and pili provide attachments
parts to Flagellum
1. Filament
. Hook
. Basal body
-flagellum doesn’t wip back and forth, it can rotate 60 degrees.
Flagella
- monotrichious - just one
- lophotrichious - small bunches from same part
- amphitrochious - flagella at both ends of bacteria
- peritricious- dispersed randomly over the surface of the cell
- bacteria with polar flagella are very speedy. Motility can be checked by putting bacteria under a microscope. Fast ones will move across the slide whereas slow ones will stay in one place.
Chemotaxis- a bacteria will move toward a good thing like chemicals such as food, and they will move away from bad things like toxic substances
- the flagella are responsible for the process of chemo taxis
- bacteria with fimbria adhere to their host causing the infection
-the gonococcus (gonorrhea) invades the genital urinary tract. E.Coli invades the intestine by these means.
- Pili are only on gram-negative bacteria and are involved in a mating process between cells so DNA is exchanged between the donor and recipient cell. Production of pili is controlled genetically.
- Spirochetes have internal flagella, Fimria have short, numerous strands, Pili have long, sparse appendages.
Cell Envelope
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