Purging and cleaning To provide a more appealingproduct for live markets, a smallnumber of producers have adopt-ed the practice of purging craw-fish before selling them. Thisprocess cleans the exoskeleton ofmud and debris and eliminates orreduces digesta in the intestine(Fig. 10), which consumers mayfind unappealing.
10 hilariously insightful foreign words. DNA electrophoresis is a method used to sort DNA molecules by length. Pieces of DNA are suspended in a tray of gel and subjected to an electric field, which causes them to migrate toward one end of the tray. The DNA separates out into bands, with the distance from the electrode corresponding to length of the strand.
All DNA molecules have the same amount of charge per mass. Because of this, gel electrophoresis of DNA fragments separates them based on size only. Using electrophoresis, we can see how many different DNA fragments are present in a sample and how large they are relative to one another.