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Identification of Bacteria

Identification of Bacteria
Which of the following is a substitute for crystal violet used in gram-staining procedure?

Phenolpthalene
Methylene blue
Safranin
Bromocresol green

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

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Joseph Christian Gram
Alexander Fleming
Hans Christian Gram
Robert Gram

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Identification of Bacteria
The gram-negative organisms is

Clostridium
None of these
Bacillus
Actinomyces

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

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

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

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