During electrophoresis, the pieces of DNA show up in the gel as bands located at various distances from the well in which the DNA was initially placed. Why do some ONA fragments move different distances from the well?

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.