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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

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

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

Shigella
Lactobacilli
Salmonella
Vibrio cholerae

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Cell Cultures and Characteristics
Cell counting can be carried out by

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

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Cell Cultures and Characteristics
Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria?

Foul odour
Presence of sulphur granules
All of these
Gas in specimen

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

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

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Cell Cultures and Characteristics
For the selection of lactobacilli present in cheddar cheese, the pH of the medium is maintained at

5.75
4.35
6.35
5.35

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