Home Biology Biotechnology Principles and Processes Previous Year Questions DNA strands on a gel stained with ethidium b…
Biology Biotechnology Principles and Processes Previous Year Questions Single Correct MCQ
Published on: August 21, 2026

DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as:

A
Bright orange bands
B
Dark red bands
C
Bright blue bands
D
Yellow bands

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The correct answer is:
A

After gel electrophoresis, the fragments of DNA that are separated can be seen under the exposure of UV radiation after staining it with ethidium bromide. This imparts bright orange colour to the fragments.

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