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Identification of Bacteria

Identification of Bacteria
Which of the following(s) show(s) positive results for phenylalanine deaminase test?

Proteus
Providencia
Morganella
All of these

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Identification of Bacteria
The primary stain of Gram's method is

safranin
crystal violet
methyl red
phenolpthalene

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Identification of Bacteria
The process of Gram staining is based on the ability of bacterial cell wall

none of above
to retain part of both dyes
to retain the crystal violet dye during solvent treatment.
to retain the safranin dye

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Identification of Bacteria
The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?

Indole test
Citrate utilization test
Methyl red test
Voges-Proskauer test

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Identification of Bacteria
What is the order of reagents used in the Gram stain?

Safranin, crystal violet, decolorizer, iodine
Crystal violet, iodine, safranin, decolorizer
Crystal violet, iodine, decolorizer, safranin
Crystal violet, safranin, iodine, decolorizer

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Identification of Bacteria
Which of the following is a primary stain for acid fast staining of mycobacteria?

Methylene blue
Carbol fuchsin
Crystal violet
Geimsa

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