DNA can be demonstrated with which reaction?

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Multiple Choice

DNA can be demonstrated with which reaction?

Explanation:
DNA is demonstrated by the Feulgen reaction. This method specifically targets the aldehyde groups generated on the deoxyribose sugar when DNA is hydrolyzed in acid. Schiff’s reagent then binds to those aldehyde groups, producing a magenta color that marks the presence of DNA in cells or tissue sections. This DNA-specific staining sets it apart from the other stains listed: the Gram stain differentiates bacteria by cell-wall properties, PAS highlights carbohydrates like glycogen, and silver stains stain a variety of structures including certain proteins and reticular fibers.

DNA is demonstrated by the Feulgen reaction. This method specifically targets the aldehyde groups generated on the deoxyribose sugar when DNA is hydrolyzed in acid. Schiff’s reagent then binds to those aldehyde groups, producing a magenta color that marks the presence of DNA in cells or tissue sections. This DNA-specific staining sets it apart from the other stains listed: the Gram stain differentiates bacteria by cell-wall properties, PAS highlights carbohydrates like glycogen, and silver stains stain a variety of structures including certain proteins and reticular fibers.

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