During agarose gel electrophoresis, separated DNA fragments…

Biology Biotechnology Principles and Processes All Topic Question For Revision Test Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

During agarose gel electrophoresis, separated DNA fragments can be visualized -

Only after staining the DNA with ethidium bromide

Only after staining the DNA with ethidum bomide followed by exposure to Infra – red exposure

After staining with ethidium bromide and exposure to UV radiation

Without staining and only by exposure to UV radiation

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The correct answer is:

Ethidium bromide binds to DNA and fluoresces under UV light, making DNA bands visible.

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