Toluidine blue primarily stains ...........

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(B) Toluidine blue is a basic thiazine metachromatic dye. It is widely used in histology and cytology to stain acidic components of the cell. It has a

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$RNA$

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(B) Toluidine blue is a basic thiazine metachromatic dye. It is widely used in histology and cytology to stain acidic components of the cell. It has a high affinity for nucleic acids,specifically $RNA$,which it stains purple or blue due to its metachromatic properties. While it can interact with $DNA$,its primary and most distinct staining application in biological tissues is for $RNA$ and acidic polysaccharides.

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