Which of the given statement is correct in the context of visualising DNA molecules separated by agarose gel electrophoresis?
 

1. DNA can be seen in visible light.
2. DNA can be seen without staining in visible light.
3. Ethidium bromide stained DNA can be seen in visible light
4. Ethidium bromide stained DNA can be seen under exposure to UV light.

Subtopic:  Separation and Isolation of DNA fragments |
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In agarose gel electrophoresis, DNA molecules are separated on the basis of their

1. charge only       
2. size only     
3. charge to size ratio       
4. All of the above

Subtopic:  Separation and Isolation of DNA fragments |
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