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Identification of Bacteria

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

crystal violet
safranin
phenolpthalene
methyl red

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Identification of Bacteria
The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to

radiation
extreme temperatures
desiccation
both (a) and (b)

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

Safranin
Phenolpthalene
Methylene blue
Bromocresol green

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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?

None of these
Appearance of growth
Both (a) and (b)
Blue colour

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

Salmonella
Streptococcus
Proteus
Staphylococcus

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

Purple
Green
Pink
Colourless

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