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Cell Cultures and Characteristics

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

Wet mount
Gram staining
None of these
Dilution and plating

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Cell Cultures and Characteristics
Agar is used for solidifying culture media because

it does not affect by the growth of bacteria
All of these
the melting and solidifying points of agar solution are not the same
it does not add to the nutritive properties of the medium

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Cell Cultures and Characteristics
A disease producing species occurring in a mixed culture can often be selected on the basis of its

pathogenic properties
special carbon source
none of these
special nitrogen source

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

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

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

acid fast organisms
gram positive bacteria
yeasts
coliform bacteria

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

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