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Cell Cultures and Characteristics

Cell Cultures and Characteristics
For the selection of endospore-forming bacteria, a mixed culture can be heated at

90°C for 10 minutes
60°C for 10 minutes
70°C for 10 minutes
80°C for 10 minutes

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Cell Cultures and Characteristics
Which of the following bacteria can grow in alkaline pH?

Shigella
Vibrio cholerae
Salmonella
Lactobacilli

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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

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

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Cell Cultures and Characteristics
Viable plate count can be obtained using

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

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Cell Cultures and Characteristics
Plate counts are often reported as

Both (a) and (b)
cfu/ml
cfu
thousands/ml

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

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

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