The Feulgen reaction is a technique developed by Feulgen and Rossenbeck and it is the standard technique for demonstrating deoxyribose. Mild acid hydrolysis (1M HCL, at 60oC) is used to break the purine-deoxyribose bond. The resulting aldehydes are then demonstrated by the use of Schiff's reagent. Schiff's reagent is formed by the reaction of sulfur dioxide with the dye basic fuchsin to produce a colorless compound known as leuco-basic fuchsin which reacts with exposed aldehydes and DNA is stained red-purple color. RNA does not demonstrate this reaction.
Thus, the correct answer is option B.
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In Gram staining of bacteria, the primary stain used is
The stain used to visualise mitochondria is
(a) fast green (b) safranin (c) acetocarmine (d) janus green
is used for staining to visualise DNA in a gel.
The stain that is used to view the bands of DNA molecules on agarose gel is
Staining dyes are used to stain the cells to make it visible under the microscope.