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  4. Having become an expert on gel electrophoresis, you are asked to examine a gel. Where would you find the smallest segments of DNA?

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Q. Having become an expert on gel electrophoresis, you are asked to examine a gel. Where would you find the smallest segments of $DNA$?

Biotechnology : Principles and Processes

Solution:

Since $DNA$ is itself negatively charged, it would move towards the positive electrode. In gel electrophoresis, $DNA$ fragments are separated on the basis of charge and masses. Thus, smaller the $DNA$ fragment farther it moves from the well.