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Cell Cultures and Characteristics

Cell Cultures and Characteristics
Viable plate count can be obtained using

Spread plate method
both (a) and (b)
Pour plate method
Hemocytometer

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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

gram positive bacteria
acid fast organisms
coliform bacteria
yeasts

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Cell Cultures and Characteristics
Cell counting can be carried out by

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

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

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

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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

none of these
pathogenic properties
special nitrogen source
special carbon source

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Cell Cultures and Characteristics
Which of the following is used for the proper maintenance and preservation of pure cultures?

Preservation by overlaying cultures with mineral oil
All of these
Preservation by lyophilization
Periodic transfer to fresh media

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