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2017 Biotechnology: Principles and Processes Gel electrophoresis – visualisation Easy Question 81 of 132 in Biotechnology: Principles and Processes

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

A Bromophenol blue

B Acetocarmine

C Aniline blue

D Ethidium bromide

The answer is D.

Solution

EtBr-stained DNA fluoresces orange under UV.

Ethidium bromide is used to stain DNA fragments, which appear as orange-coloured bands under UV light.

Concept ethidium-bromide-staining

Biotechnology: Principles and Processes in past papers

132 questions from this chapter have appeared across 26 exam years.