4. Classify bacteria by habitat
1. halophile
2. coliform: your
digestive tract
3. thermophile
4. acidophile
5. Classify bacteria by metabolic pathway
1. obligate aerobe:
require O2
2. anaerobe: O2 kills
anaerobes
3. facultative aerobe: can
live with O2 and not
4. heterotroph v
photoautotroph
8. Classify bacteria by metabolic pathway
• E. coli (facultative)
1. obligate aerobe:
require O2
2. anaerobe: O2 kills
anaerobes
3. facultative aerobe: can
live with O2 and not
9. Classify bacteria by metabolic pathway
• cyanobacteria
(photoautotroph)
1. obligate aerobe:
require O2
2. anaerobe: O2 kills
anaerobes
3. facultative aerobe: can
live with O2 and not
4. heterotroph v
photoautotroph
10. capsule: sugar material that covers cell
wall
• Strep pyroxenes, H.
influenza
• protect against
phagocytosis
• protect against
desiccation
• allow adherence
11. fimbriae & pile: attachment purpose
structures
• pile: used for
conjugation (sexual
reproduction)
12. slime layer: sticky matrix of
polysaccharides that protects the
bacteria
• Streptococcus mutans
cause tooth decays
14. internal/genome structure of bacteria
• one chromosome (DNA)
• no organelles
• plasma membrane
carries out metabolic
processes
• Some bacteria have
additional
genomes, circular
DNA, plasmids
42. Gram
• exotoxin
– made of G positive
– botulin and tetanin are
examples
– can elicit immune
response
– can be vaccinated
against
• endotoxin
– made of G-negative
– made of outer
membrane (OM)
– are released when
bacteria die
– does NOT elicit an
immune response
– you get more sick
– vaccination is difficult