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Identification of Bacteria

Identification of Bacteria
Which of the following shows a positive urease test?

Proteus
Both (a) and (b)
Klebsiella
None of these

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

Vibrio
Neisseria
Pseudomonas
All of these

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

Colourless
Purple
Pink
Green

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Identification of Bacteria
The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?

Voges-Proskauer test
Citrate utilization test
Indole test
Methyl red test

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

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

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Identification of Bacteria
The gram-negative organisms is

None of these
Bacillus
Actinomyces
Clostridium

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