What is the following is correct for the movement of DNA fragments on agarose gel during gel electrophoresis?

What is the following is correct for the movement of DNA fragments on agarose gel during gel electrophoresis?
  1. The larger the fragment size, the farther it moves
  2. The smaller the fragment size, the farther it moves
  3. Positively charged fragments move to farther end
  4. Negatively charged fragments do not move

Solution

Gel electrophoresis is used for the separation of molecules of similar electric charges on the basis of their size. Hence, smaller the DNA fragment size the farther it moves.

Asked in: NEET 2017

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