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Identification of Bacteria

Identification of Bacteria
Production of acetoin can be detected by which of the following tests?

Citrate test
Methyl red test
Indole test
Voges-Proskauer test

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

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

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Identification of Bacteria
The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to

radiation
extreme temperatures
both (a) and (b)
desiccation

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Identification of Bacteria
Which of the following(s) is/ are oxidase-positive bacteria?

Pseudomonas
Vibrio
Neisseria
All of these

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

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

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

Crystal violet
Geimsa
Methylene blue
Carbol fuchsin

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