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Identification of Bacteria

Q1: Which of the following is a substitute for crystal violet used in gram-staining procedure?

A Methylene blue

B Bromocresol green

C Safranin

D Phenolpthalene

ANS:A - Methylene blue

If the crystal violet is not available for gram staining so use the methyl violet or gentian violet as a substitute of crystal violet. (Monica vol. 2 for microbiology for tropical country. ).



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