In gel electrophoresis, dna fragments move across a gel. what causes them to move?

Because each DNA molecule is negatively charged, it can be pulled through the gelby an electric field. Small DNA molecules move more quickly through the gel than larger DNA molecules. The result is a series of 'bands', with each band containingDNA molecules of a particular size.

Writing, you can revisit previous parts of the lesson by returning to the course map. be sure to refer to the lab’s student guide, which you can find on the first page of the lab experiment activity