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Identification of Bacteria

Identification of Bacteria
Catalase production is negative in which of the following?

Staphylococcus
Salmonella
Proteus
Streptococcus

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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 the safranin dye
to retain part of both dyes
to retain the crystal violet dye during solvent treatment.

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

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

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

Crystal violet
Methylene blue
Carbol fuchsin
Geimsa

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Alexander Fleming
Joseph Christian Gram
Robert Gram
Hans Christian Gram

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