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Identification of Bacteria

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

Shigella
Vibrios
Salmonella
Spirochaetes

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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
The primary stain of Gram's method is

methyl red
crystal violet
safranin
phenolpthalene

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Identification of Bacteria
The process of Gram staining is based on the ability of bacterial cell wall

to retain the safranin dye
none of above
to retain the crystal violet dye during solvent treatment.
to retain part of both dyes

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

Methyl red test
Indole test
Citrate test
Voges-Proskauer test

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

Streptococcus
Proteus
Salmonella
Staphylococcus

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