Biology Biotechnology Principles and Processes Principles of Biotechnology and Restriction Enzymes Single Correct MCQ
Published on: August 13, 2026

The DNA fragments separated on an agarose gel can be visualised after staining with

A
bromophenol blue
B
acetocarmins
C
aniline blue
D
ethidium bromide

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The correct answer is:
D

Ethidium bromide (EtBr) intercalates between DNA bases and fluoresces under UV light, making DNA bands visible on an agarose gel.

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