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Cell Cultures and Characteristics

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

Mycobacterium tuberculosis
Staphylococcus aureus
Pseudomonas aeruginosa
Treponema pallidium

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Cell Cultures and Characteristics
Viable plate count can be obtained using

Pour plate method
Spread plate method
both (a) and (b)
Hemocytometer

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Cell Cultures and Characteristics
The solidifying agent commonly used in preparation of media is/are

silica gel
none of these
agar
both (a) and (b)

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Cell Cultures and Characteristics
In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

-48 to -58°C
-30 to -48°C
-20 to -30°C
-60 to -78°C

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

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

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Cell Cultures and Characteristics
In the pour plate method, the mixed culture is diluted directly in tubes of

liquid agar medium
sterile liquid usually water
none of these
both (a) and (b)

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