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Identification of Bacteria

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

safranin
crystal violet
phenolpthalene
methyl red

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Identification of Bacteria
Which of the following inference(s) indicate(s) the ability of an organism to utilize citrate as a sole source of carbon in Simmon's citrate medium?

Blue colour
Appearance of growth
None of these
Both (a) and (b)

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Alexander Fleming
Hans Christian Gram
Robert Gram
Joseph Christian Gram

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

Carbol fuchsin
Geimsa
Crystal violet
Methylene blue

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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, safranin, iodine, decolorizer
Crystal violet, iodine, decolorizer, safranin
Crystal violet, iodine, safranin, decolorizer

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

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

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