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Cell Cultures and Characteristics

Cell Cultures and Characteristics
Which of the following bacteria dies quickly after drying?

Mycobacterium tuberculosis
Treponema pallidium
Staphylococcus aureus
Pseudomonas aeruginosa

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Cell Cultures and Characteristics
When a substance is added to a solid medium which inhibits the growth of unwanted bacteria but permits the growth of wanted bacteria, it is known as

differential medium
enrichment medium
selective medium
enriched medium

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Cell Cultures and Characteristics
Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited.

low levels of nitrogen
bile salts
sugars
low concentration of various dyes

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Cell Cultures and Characteristics
Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type?

Pour plate
Streak plate technique
Both (a) and (b)
Spread plate

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Cell Cultures and Characteristics
Peptone water and nutrient broth are

enriched media
selective media
none of these
basal media

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Cell Cultures and Characteristics
Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate

yeasts
coliform bacteria
gram positive bacteria
acid fast organisms

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