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10 Cards in this Set
- Front
- Back
- 3rd side (hint)
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WB Questions
31- What is the purpose of the mouse neutralization test? |
To test the presence of botulism in foods.
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32- Describe char. which make agar-agar a useful media for bacterial growth?
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a- solid @ room temp
b- melts @ boiling temp 100d C c- once liq-doesn't solidify , cools @ 42deg C |
d- flexible, moldable , holds basic framework 2 hold moisture & nutrients
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33- Define media: Liquid
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Liquid: water based sol/ doesn't solidify @ temp above freezing, free flow container
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free flow container is tilted
EX: broths, milks, infusions..can b dispersed, have cloudy appearance |
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34- Define media: Semisolid
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Clot-like consistency, has sml amt of solidifying agent
(agar, gelatin) thickens |
but doesn't produce firm sub-
strate *Determines motility of bact. |
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35- Name two stains commonly used for their negative staining capabilities:
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Nigrosin and India Ink
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36- _______ media is used to isolate fungi.
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Sabouraud's media
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37- Lowenstein-Jensen media is used to isolate:
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Mycobacterium
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38- ____ agar can be used to identify Salmonella and Shigella.
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Mannitol salt
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39- Which of the following is NOT a differential stain?
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crystal violet
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gram, spore, acid-fast, crystal violet & a capsule
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40- Explain difference btwn synthetic and non-synthetic media?
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Synthetic media composition is chemically defined- has specified exact formula
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Non-synthetic media has at least One ingredient not chemically definable
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