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What is gram positive bacteria colour ?

pick up only primary stain of violet colour (crystal violet )


Resist Decolourisation

only 1 colour pick up.

What is the Colour of negative gram Staining bacteria ?

Red .


( Get decolourised by acetone )


picks up counterstain Safranin.

( picks up both stains)

What is the name of the counterstain in gram negative bacteria ?

Safranin

(of Red colour)