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

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

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

Indole test
Citrate test
Methyl red test
Voges-Proskauer test

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

Staphylococcus
Proteus
Salmonella
Streptococcus

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Identification of Bacteria
What is the colour of gram-negative bacteria on a gram staining?

Pink
Green
Purple
Colourless

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Identification of Bacteria
The organisms that can be acid-fast stained is

Nocardia
Lepra bacilli
all of these
Tubercle bacilli

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