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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

70°C for 10 minutes
60°C for 10 minutes
90°C for 10 minutes
80°C for 10 minutes

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Cell Cultures and Characteristics
Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria?

Gas in specimen
Foul odour
Presence of sulphur granules
All of these

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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
Pseudomonas aeruginosa forms a blue water soluble pigment called

pyoverdin
chlororaphin
pyocyanin
β-carotene

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Cell Cultures and Characteristics
All bacteria that inhabit the human body are

autotrophs
chemolithotrophs
phototroph
heterotrophs

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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
special nitrogen source
pathogenic properties
special carbon source

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