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Identification of Bacteria

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

Voges-Proskauer test
Methyl red test
Indole test
Citrate test

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Identification of Bacteria
Which of the following is commonly used as Gram's decolouriser?

Methyl alcohol
Ethyl alcohol
Acetone
A mixture of ethyl alcohol and acetone

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

Vibrios
Spirochaetes
Shigella
Salmonella

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Identification of Bacteria
The gram-negative organisms is

Clostridium
None of these
Actinomyces
Bacillus

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

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

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

Proteus
Streptococcus
Salmonella
Staphylococcus

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