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

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Cell Cultures and Characteristics
Pseudomonas aeruginosa forms a blue water soluble pigment called

pyoverdin
β-carotene
pyocyanin
chlororaphin

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Cell Cultures and Characteristics
Plate counts are often reported as

cfu/ml
Both (a) and (b)
cfu
thousands/ml

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Cell Cultures and Characteristics
Which of the following bacteria dies quickly after drying?

Pseudomonas aeruginosa
Staphylococcus aureus
Mycobacterium tuberculosis
Treponema pallidium

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Cell Cultures and Characteristics
Cell counting can be carried out by

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

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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
none of these
special carbon source
special nitrogen source

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