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Cell Cultures and Characteristics

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

coulter counter
none of these
petroff-hausser counting chamber
hemocytometer

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

90°C for 10 minutes
70°C for 10 minutes
80°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 acidic pH?

Shigella
Salmonella
Vibrio cholerae
Lactobacilli

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Cell Cultures and Characteristics
The concentration of agar to obtain semi solid media is

>10%
0.5% or less
>10%but<20%
1.5-20%

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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
bile salts
low levels of nitrogen
sugars

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Cell Cultures and Characteristics
Important example(s) of enriched medium/media is/ are

Loeffler's serum slope
Blood agar
Bordet-gengou medium
All of these

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