Q176 / 180 · NEET 2020 (Phase 1) · Zoology

In gel electrophoresis, separated DNA fragments can be visualized with the help of

  • Correct answer
    A
    Ethidium bromide in UV radiation
  • B
    Acetocarmine in UV radiation
  • C
    Ethidium bromide in infrared radiation
  • D
    Acetocarmine in bright blue light

Solution

The DNA fragments separated by gel electrophoresis can be visualized only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. Pure DNA fragments in the visible light and without staining cannot be observed. DNA when stained with ethidium bromide appears bright orange bands under UV radiations.

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

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