Question
Biology Question on biotechnology
Which of the statements 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
Answer
Ethidium bromide stained DNA can be seen under exposure to UV light
Explanation
Solution
DNA cannot be seen in visible light, so options a and b are incorrect. Staining by ethidium bromide and presence of UV light are necessary to see DNA. So, the correct answer is 'Ethidium bromide stained DNA can be seen under exposure to UV light.'