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Cell Cultures and Characteristics

Cell Cultures and Characteristics
Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate

gram positive bacteria
coliform bacteria
yeasts
acid fast organisms

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

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Cell Cultures and Characteristics
A medium containing crystal violet dye plus sodium deoxycholate will allow

none of these
aquatic bacteria to grow
gram (+)ve intestinal bacteria to grow
gram (-)ve intestinal bacteria to grow

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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

6.35
4.35
5.35
5.75

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

hemocytometer
petroff-hausser counting chamber
none of these
coulter counter

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Cell Cultures and Characteristics
When a substance is added to a liquid medium which inhibits the growth of unwanted bacteria and favors the growth of wanted bacteria, it is known as

differential medium
enriched medium
enrichment medium
selective medium

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