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Model Paper 6 — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETModel Paper 64 Marks
MCQ
Bright orange coloured bands of DNA can be seen when:
  • A
    Stained with ethyl bromide and exposed to UV rays
  • B
    Stained with ethidium bromide and exposed to normal ligt
  • C
    Stained with ethyl bromide and exposed to x-rays
  • ✓
    Stained with ethidium bromide and exposed to UV rays.
✓

Answer

Correct option: D.
Stained with ethidium bromide and exposed to UV rays.
(D)
In gel electrophoresis the separated DNA fragments can be visualized only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. Bright orange coloured bands of DNA can be seen when stained with ethidium bromide and exposed to UV light.

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