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Cell Cultures and Characteristics

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

coulter counter
hemocytometer
petroff-hausser counting chamber
none of these

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

Vibrio cholerae
Salmonella
Lactobacilli
Shigella

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Cell Cultures and Characteristics
To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at a pH of

3.5
6.79
8.5
8.90

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

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

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Cell Cultures and Characteristics
Which of the following methods is most likely to be quantitative?

Gram staining
Dilution and plating
Wet mount
None of these

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Cell Cultures and Characteristics
Cell counting can be carried out by

direct microscopic count using petroffhansser counting chamber
All of these
membrane filter count
plate counting

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