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12 Cards in this Set
- Front
- Back
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Biofilm |
Polymer-encased community of microorganisms |
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Chemically Defined Medium |
A culture medium composed of exact quantities of pure chemicals; generally used for specific experiments when nutrients must be precisely controlled |
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Complex Medium |
A culture medium that contains protein digests, extracts, or other ingredients that vary in their chemical composition |
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Differential Medium |
A culture medium with an ingredient that certain microorganisms change in a recognizable way; used to differentiate microbes based on their metabolic traits |
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Exponential (Log) Phase |
Stage in the growth curve during which cells divide at a constant rate; generation time is measured during this period of active multiplication |
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Facultative Anaerobe |
Organism that grows best if O2 is available, but can also grow without it |
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Generation Time |
The time it takes for a population to double in number |
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Obligate Aerobe |
Organism that requires molecular oxygen (O2) |
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Obligate Anaerobe |
Organism that cannot multiply, and is often killed, in the presence of O2 |
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Plate Count |
Method to measure the concentration of viable cells by determining the number of colonies that develop from a sample added to an agar plate |
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Pure Culture |
A population descended from a single cell |
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Selective Medium |
A culture medium with an ingredient that inhabits the growth of microbes other than the one being sought |
