Question

Which of the following steps should be performed by a person in order to visualise the bands of DNA fragments obtained from gel electrophoresis?

• A. Exposure of DNA fragments to UV radiations
• B. Staining with bromophenol blue followed by exposure to UV radiations
• C. Staining with ethidium bromide followed by exposure to UV radiations
• D. Person can see the bands without staining

Answer 1

Answer: (C)

Staining with ethidium bromide followed by exposure to UV radiations

The bands of DNA fragments obtained from gel electrophoresis visualised only after staining the fragments with ethidium bromide followed by exposure to UV radiations. You can see bright orange coloured bands of DNA after staining.

So, the correct option is 'Option C' .