explain how the net charge on a molecule an important factor in electrophoresis in results in related to identifing a suspect in a crime using a sample of DNA?
2007-11-06 04:42:58 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology
A molecule must have a charge to be moved in electrophoresis. DNA fragments have different charges because they have different sizes, and they move at different speed in electrophoresis.
2007-11-06 04:52:59 · answer #1 · answered by OKIM IM 7 · 0⤊ 0⤋
DNA has a net negative charge, so when they do the "DNA fingerprint" stuff they have to run the results out on a gel using electrophoresis. The net charge on the molecules allows them to be sorted by size. Then they compare the different migration patterns of the various bands they generated in the analysis to make some sort of judgement about who did it.
2007-11-06 12:55:40 · answer #2 · answered by archaeadoc 5 · 0⤊ 0⤋