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18 Cards in this Set
- Front
- Back
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Gram staining |
A method of staining bacteria which aids identification. |
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Gram positive bacteria |
These bacteria appear violet when stained and viewed under the microscope. |
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Gram negative bacteria |
These bacteria appear red when stained and viewed under a microscope. |
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Peptidoglycan |
Part of the cell wall of a bacteria, also known as murien. |
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Lipopolysaccharide |
A layer of a cell wall found in only gram negative bacteria. |
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Aseptic |
A procedure performed under sterile conditions |
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Pathogen |
A disease causing bacteria. |
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Sterilisation |
To make the instruments sterile by destroying microorganisms |
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Inoculation |
To introduce a microorganism into a culture or onto an agar plate |
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Incubation |
Bacteria are grown under constant temperature - 25°c |
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Serial dilution |
A method of diluting a culture usually in 10 fold steps. |
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Colony |
A cluster of cells or clones which arises from a single bacterium by asexual reproduction. |
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Fermenter |
Vessel used to culture microorganisms, usually on an industrial scale. |
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Haemocytometer |
A special microscope slide used to give the total number of cells in a culture. |
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Viable cell count |
Method used to count the number of living cells in a culture. |
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Turbidity |
A measure of the cloudiness of a culture, it gives an indication of the number of cells in a culture. |
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Penicillin |
An antibiotic produced by a fungus penicilliumnotatum. |
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Secondary metabolite |
A chemical that is only produced when nutrient supplies are scarce. |
