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Identification of Bacteria

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

Geimsa
Carbol fuchsin
Crystal violet
Methylene blue

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

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

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

Methyl red test
Indole test
Voges-Proskauer test
Citrate test

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Identification of Bacteria
What is the colour of gram-negative bacteria on a gram staining?

Colourless
Purple
Green
Pink

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Identification of Bacteria
At what concentration of sulphuric acid, Nocardia resists decolourization?

0.5% sulphuric acid
8% sulphuric acid
10% sulphuric acid
5% sulphuric acid

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

crystal violet
methyl red
safranin
phenolpthalene

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