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Identification of Bacteria

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

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

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Identification of Bacteria
Gram staining was developed accidentally in 1884 by

Alexander Fleming
Robert Gram
Joseph Christian Gram
Hans Christian Gram

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

Pink
Purple
Green
Colourless

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

Shigella
Vibrios
Spirochaetes
Salmonella

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

Proteus
Salmonella
Staphylococcus
Streptococcus

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

All of these
Morganella
Providencia
Proteus

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