BIMM 120 CH 5

Normal growth conditions for microbes (pressure, temp, pH)
- sea-level
- 20-40C
- neutral pH
T/F - bacteria have the same temp as their environment

true
T/F - microbes that grow in higher temp typically have lower growth rates

false
Growth rate ___ for every ___ rise in temp

doubles; 10C
order from lowest temp loving to highest temp loving

psychrophiles, mesophiles, thermophiles, hyperthermophiles
What do chaperones do during temp change?

maintain the shape of the proteins
organisms that grow under high pressure

barophiles/piezophiles
water activity for most bacteria

>0.91
microbes that require high salt concentrations

halophiles
classes of organisms differentiated by pH growth range
- acidophiles (0-5)
- neutrophiles (5-8)
- alkaliphiles (9-11)
converts superoxide radical to hydrogen peroxide

superoxide dismutase
converts hydrogen peroxide to water and oxygen

catalase
converts hydrogen peroxide to water and NAD+

peroxidase
infusion of a limiting nutrient and what it can lead to

eutrophication; blooms
D-value

length of time it takes to kill 90% of population
D. radiodurans
- can survive high radiation
- can repair radiation damaged DNA
bacteriostatic vs. bactericidal

stops growth vs kills
common antibiotic targets
- peptidoglycan
- cell membrane
- protein synthesis
- DNA replication
phage therapy

treats bacterial diseases with a virus targeted to the pathogen

Author

andrewlee22087

317078

Card Set

BIMM 120 CH 5

Description

bacteriology

Updated

2016-03-09T06:17:18Z

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