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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Optimal growth temperature |
The temperature at which a species grows best. |
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Psychrophile |
An organism that grows best at about 15°C and does not grow above 20°C; a cold-loving microbe. |
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Mesophile |
An organism that grows between about 10°C and 50°C; a moderate-temperature–loving microbe. |
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Thermophile |
An organism whose optimum growth temperature is between 50°C and 60°C; a heat loving microbe. |
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Acidophile |
A bacterium that grows below pH 4. |
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Plasmolysis |
Loss of water from a cell in a hypertonic environment. |
Hypertonic solution: A solution that has a higher concentration of solutes than an isotonic solution. |
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Obligate halophile |
An organism that requires high osmotic pressures such as high concentrations of NaCl. |
Osmotic pressure: The force with which a solvent moves from a solution of lower solute concentration to a solution of higher solute concentration. |
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Biofilm |
A microbial community that usually forms as a slimy layer on a surface. |
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Chemically defined media |
A culture medium in which the exact chemical composition is known. |
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Complex media |
A culture medium in which the exact chemical composition is not known |
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Selective media |
A culture medium designed to suppress the growth of unwanted microorganisms and encourage the growth of desired ones. |
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Differential media |
A solid culture medium that makes it easier to distinguish colonies of the desired organism. |
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Generation time |
The time required for a cell or population to double in number. |
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