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Answer: 3. Ethidium bromide

Key idea: DNA bands on agarose are seen with a dye that binds DNA and fluoresces.

Ethidium bromide intercalates between the bases and glows orange under UV light. Acetocarmine stains chromosomes in squashes, aniline blue stains callose, and bromophenol blue is a tracking dye added to the sample. Answer: (3).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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