Zusammenfassung der Ressource
Bacteria
- Categories of
Bacteria
- unlikely to survive
in the body
Anmerkungen:
- conditions of the body is not suitable for it to survive.
unsuitble pH or wrong temperature
- if ingested with food usually it will be killed by stomach acid
- Desirable Bacteria
- milk-souring bacteria
Anmerkungen:
- help in the breakdown of milk in the stomach by renin
- in the large
intestine
Anmerkungen:
- contribute to the final formation of faces
- some of the intestinal bacteria are dangerous if allowed to multiply on food
- undesirable Bacteria
- Feed on the tissue of the body
- cause disease by reproducing rapidly
in the body and producing poisonous
toxins
- result of
- unhygienic conditions
- Direct contact
with infected
people
- Bacterial structure
- single celled
- single DNA
Anmerkungen:
- slime layer
Anmerkungen:
- loose gelatinous sheath
- deposit around the bacterial cell wall
- provides protection
- capsul
Anmerkungen:
- when the slime layer become thick it forms capsule
- for protection
- cell wall
Anmerkungen:
- provide specific shape and protection
- prevents cell from swelling and bursting due to osmotic changes
- composed of polysaccharide and protein
- flagella
Anmerkungen:
- extends outward of the cell
- long ,slender, thread like structure
- help in locomotion
- composed of protein flagellin
- Directly attached th the plasma membrane and not covered by any sheath
- Replication by
binary fission
- Shapes