Q. Which of the following statement is correct in the context of observing DNA separated by agarose gel electrophoresis?
A) DNA can be seen in visible light
B) DNA can be seen without staining in visible light
C) Ethidium bromide stained DNA can be seen in visible light
D) Ethidium bromide stained DNA can be seen under exposure to UV light
Explanation
The separated DNA fragments can be seen only after staining the DNA with a compound known as ethidium bromide (E + Br) followed by exposure to UV radiation as bright orange coloured bands
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.