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In gel electrophoresis, separated DNA fragments can be visualized with the help of

1. (a) Ethidium bromide in UV radiation
2. (b) Acetocarmine in UV radiation
3. (c) Ethidium bromide in infrared radiation
4. (d) Acetocarmine in bright blue light

Correct answer: (a) Ethidium bromide in UV radiation

Solution

Ethidium bromide binds between DNA bases and fluoresces when exposed to UV light, making DNA bands visible after gel electrophoresis. The other options do not match the standard DNA staining and detection method.

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