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8 Cards in this Set
- Front
- Back
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Chemial Requirements
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carbon, nitrogen, sulfur, phosphorus, Are needed in large amounts for microbial growth.
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What organisms require Carbon
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All organisms require a carbon source. Chemoheterotrophs use organic molecules.
Autotrophs use co2 |
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Nitrogen
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Needed for protein synthesis and nucleic acid synthesis.
Nitrogen is obtained from decompositon of proteins. |
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On the basis of Oxygen requirements organisms are classified
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Obligate aerobes - Require o2 to live
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Faculatative Anaerobes
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Require NO 02.
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Obligate Anaerobes-
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Bacteria unable to use 02. Most are harmed by it. Eg. Tetanus, Botulish``
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Aerotolerant anaerobesd-
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Cannot use 02 for growth
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Microaerophiles
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Require 02 only grow in 02 concentrations lower than in air.
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