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Identification of Bacteria

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

safranin
crystal violet
methyl red
phenolpthalene

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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
At what concentration of sulphuric acid, Nocardia resists decolourization?

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

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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
Methyl red test
Indole test
Citrate utilization test

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Identification of Bacteria
The gram-negative organisms is

Actinomyces
Bacillus
Clostridium
None of these

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

Safranin
Methylene blue
Bromocresol green
Phenolpthalene

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