Question

What is Gram stain ?

Answer 1

Hi

A gram stain is -

▪a staining technique for the preliminary identification of bacteria.

▪ During this process a violet dye is applied, followed by a decolorizing agent and then a red dye.

▪ The cell walls of certain bacteria retain the first dye and appear violet, while those that lose it appear red.


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Answer 2

a staining technique for the preliminary identification of bacteria, in which a violet dye is applied, followed by a decolorizing agent and then a red dye. The cell walls of certain bacteria (denoted Gram-positive ) retain the first dye and appear violet, while those that lose it (denoted Gram-negative ) appear red.

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