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Identification of Bacteria

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

methyl red
crystal violet
phenolpthalene
safranin

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Identification of Bacteria
Which of the following(s) is/ are oxidase-positive bacteria?

All of these
Pseudomonas
Vibrio
Neisseria

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

Indole test
Methyl red test
Citrate test
Voges-Proskauer test

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

Proteus
Staphylococcus
Salmonella
Streptococcus

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Identification of Bacteria
Which of the following(s) show(s) positive results for phenylalanine deaminase test?

Providencia
Proteus
Morganella
All of these

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

Pink
Purple
Green
Colourless

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