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Identification of Bacteria

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

safranin
phenolpthalene
methyl red
crystal violet

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Identification of Bacteria
Which of the following organisms can be demonstrated with silver impregnation method?

Salmonella
Shigella
Vibrios
Spirochaetes

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

Indole test
Voges-Proskauer test
Citrate test
Methyl red test

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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?

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

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Identification of Bacteria
Which of the following is commonly used as Gram's decolouriser?

A mixture of ethyl alcohol and acetone
Methyl alcohol
Ethyl alcohol
Acetone

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Robert Gram
Alexander Fleming
Hans Christian Gram
Joseph Christian Gram

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