Q178 / 180 · NEET 2017 · Zoology

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

  • A
    Bromophenol blue
  • B
    Acetocarmine
  • C
    Aniline blue
  • Correct answer
    D
    Ethidium bromide

Solution

The DNA fragments separated on an agarose gel can be visualised after staining with ethidium bromide. It is an intercalating agent and a fluorescent agent. The stained DNA fragments are seen as bright orange-coloured bands under UV light. Intercalation is the insertion of molecules between the planar bases of DNA. This process is used as a method for analysing DNA. 

Hence, the correct answer is option: 'D'.

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