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Bio 2100 microbiology exam 2 review units 4, 5, & 6- galen college
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Bio 2100 microbiology exam 2 review units 4, 5, & 6- galen college
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Microbiology Galen Exam 21.obligate anaerobes: can not grow in the presence of O2
2.Microaerophiles: require lower concentrations of O2
3.facultative anaerobes: can live with or without oxygen; but grow better in O2
4.aerotolerant anaerobes: tolerant of O2; grows better without it
5.obligate aerobes: need O2; about the same as humans
6.Canophiles: Microbes that require high CO2 conditions
7.Thioglycollate media: a reducing media that creates an O2 gradient
8.Pschrophile: A microorganism that grows optimally below 15°C and is
capable of growing at 0°C.
9. Pschrotrophs: grows best b/w 15-30 degrees, but can grow at 4 degrees C in
fridge, usually causes FOOD BORN ILLNESSES
10. Pschroduric: can endure cold but prefer,warm temps
11. Mesophiles: those growing best between 25 degrees and 45 grow well at
room temp
degrees Celcius; the human pathogens are in this group
12. Thermophiles: like warm to hot temps; 45 degrees Celsius to 70 degrees
Celsius
13. Hyperthermophiles: Organisms that grow in extremely high temperatures (90
degrees C)
14. Acidophiles: grow in acidic environments; ph 2 to 5
15. Alkaliphiles: grow in an alkaline environment pH above 8.5
16. osmotic pressure: is the pressure that is exerted on a cell membrane by
solutions both inside and outside the cell
17. Osmosis: diffusion of water across a selectively permeable membrane
18. Halophiles: "salt-loving" archaea that live in environments that have very high
salt concentrations
19. obligate halophiles: those that grow in up to 30% salt, require high osmotic
pressure
20. facultative halophiles: those that do not require, but can tolerate high salt
concentrations, tolerate high osmotic pressure
21. Haloduric: capable of surviving in salty environment but not preferred environ-
ment
22. Osmotolerant: endure high salt or high sugar enviroments
23. Plasmolysis: This happens when a cell shrinks shrinks ;losing fluid
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