Question

In agarose gel electrophoresis:

• A. DNA migrates towards the negative electrode
• B. Supercoiled plasmids migrate slower than their nicked counterparts
• C. Larger molecules migrate faster than smaller molecules
• D. Ethidium bromide can be used to visualize the DNA

Answer 1

The correct option is D Ethidium bromide can be used to visualize the DNA

Gel electrophoresis is the process to separate DNA on the basis of molecular charge. As DNA having negative charge they move towards the positive electrode. Small fragment of DNA move faster than large size fragment. Ethidium bromide is added to the buffer during the separation of DNA fragments in this process to visualize.