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Cell Cultures and Characteristics

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

pyoverdin
pyocyanin
chlororaphin
β-carotene

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

petroff-hausser counting chamber
none of these
coulter counter
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

acid fast organisms
yeasts
gram positive bacteria
coliform 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

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

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
Which of the following bacteria can grow in acidic pH?

Salmonella
Lactobacilli
Vibrio cholerae
Shigella

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