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CELL CULTURES AND CHARACTERISTICS

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

Shigella
Vibrio cholerae
Lactobacilli
Salmonella

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Cell Cultures and Characteristics
Cell size and cell number can be measured using

petroff-hausser counting chamber
hemocytometer
coulter counter
none of these

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Cell Cultures and Characteristics
Which of the following is used for the proper maintenance and preservation of pure cultures?

Periodic transfer to fresh media
All of these
Preservation by overlaying cultures with mineral oil
Preservation by lyophilization

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

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

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

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