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Identification of Bacteria

Identification of Bacteria
The gram-negative organisms is

None of these
Clostridium
Actinomyces
Bacillus

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

Shigella
Salmonella
Spirochaetes
Vibrios

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

All of these
Pseudomonas
Neisseria
Vibrio

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

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

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Identification of Bacteria
At what concentration of sulphuric acid, Nocardia resists decolourization?

5% sulphuric acid
8% sulphuric acid
0.5% sulphuric acid
10% sulphuric acid

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Identification of Bacteria
Which of the following is a substitute for crystal violet used in gram-staining procedure?

Phenolpthalene
Methylene blue
Bromocresol green
Safranin

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