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Definition
| use oxygen as substrate in obligatory metabolism |
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Definition
| poisoned by any exposure to oxygen in form of O2 |
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| don't use oxygen as substrate but tolerate its presence; must get element other ways |
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| organisms that use reduced, preformed organic molecules as their carbon source. Obtain H, O, C, and electrons from same molecules |
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Term
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Definition
| use simple carbons like carbon dioxide. Carbon dioxide cannot be used as a source of hydrogen, electrons, or energy |
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Definition
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Term
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Definition
| use high energy organics, inorganics, or small inorganics. obtain energy from oxidation of chemical compounds |
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Term
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Definition
-5 to 15 C
-loss of membrane fluidity (decrease fatty acid tail length)
-decrease in enzymatic activity rates
-destabilization of biomolecules
-ice crystal formation could rupture plasma membrane |
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Term
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Definition
20 to 30 C
-important in food spoilage
-can survive refridgerator temperatures |
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Term
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Definition
20 to 45 C
-e. coli and other common bacteria
-many disease causing pathogens that thrive in human body |
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Term
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Definition
45 to 70 C
-hot springs, compost heaps
-membranes loose and leaky
-enzyme and protein stability
-DNA melts (increast G-C content) |
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Term
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Definition
greater than 70 C
-usually members of archaea
-found in sea floors of hydrothermal vents |
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| require high NaCl content to grow |
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