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7 Cards in this Set
- Front
- Back
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When an agar plate is inoculated why is the loop sterilized after the initial inoculum is put on? |
So you don't cross contaminate |
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Pure culture definition |
Contains one species |
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Mixed culture definition |
Contains more than one species |
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Define bacterial colony. List four characteristics they can be distinguished |
A cluster of a bacteria on the surface of an agar plate. Form, elevation,margin and color |
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Why does the streaking method you used to inoculate your plates result in isolated colonies? |
Because we sterilize the loop each time we streak it therefore the cells spread out and form a single colony |
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Why was a blood agar rather than a nutrient agar plate used for the culture from your mouth? |
The bacteria growing in or on a host have access to nutrient so blood agar is used. |
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Are the large numbers of microorganism found in the mouth cause for concern? |
No because the normal flora in the mouth keeps the harmful bacteria from attaching to the mucosa |
