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Identification of Bacteria

Identification of Bacteria
The organisms that can be acid-fast stained is

all of these
Nocardia
Lepra bacilli
Tubercle bacilli

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

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

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

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

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

Safranin
Bromocresol green
Methylene blue
Phenolpthalene

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

crystal violet
phenolpthalene
safranin
methyl red

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