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Flashcards in microbial growth Deck (18)
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1

psychrophiles growth range

-5 to 15 C

2

mesophiles growth range

25 to 45C

3

mesophiles growth range in human body

35 to 40

4

thermophiles growth range

45 to 70

5

oxygen reqs for obligate aerobes

absolute req for oxygen. use itto generate energy via aerobic respiration

6

oxygen reqs for obligate anaerobes

cannot multiply if oxygen is present, often killed by traces of oxygen due to toxic derivatives

7

oxygen reqs for facultative anaerobes

grow better if oxygen is present, but can grow without it. better with oxygen because aerobic resp yields more ATP

8

microaerophiles oxygen reqs

requires small amounts of oxygen (2-10%) for aerobic resp. higher concentrations are inhibitory

9

aerotolerant anaerobes oxygen reqs

indifferent to oxygen. can grow in its presence but do not use it to transform energy

10

order of most dependent on oxygen to least

obligate aerobes
microaerophiles
facultative aerobes
aerotolerant anaeroges
obligate anaerobes

11

what does superoxide dismutase do

converts O2- to H2O2 and O2

12

what does catalase do

converts H2O2 to H2O and O2

13

neutrophiles thrive in what ph range

5-8

14

acidophiles thrive in what ph range

below 5.5

15

are gut bacteria neutrophiles, acidophiles, or alkalophiles

neutrophiles with ability to change ph

16

alkalophiles thrive in what ph range

above 8.5

17

what is an osmotolerant bacteria

tolerant of high salt enviros (up to 10%)

18

what is a halophile

requires high levels of salt to live and multiply (more than 10%)