Solution

DNA stained with ethidium bromide shows bright orange bands under UV light.

In gel electrophoresis the separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. Bright orange coloured bands of DNA can be seen when stained with ethidium bromide and exposed to UV light.

Concept ethidium bromide staining

Tools of Recombinant DNA Technology – Gel Electrophoresis in past papers

4 questions from this chapter have appeared across 4 exam years.