This document discusses electrophoresis techniques for separating proteins and nucleic acids. It defines electrophoresis as a technique where biomolecules in solution are separated when subjected to an electric field based on their charge. The document describes the different factors that affect biomolecule mobility during electrophoresis, including charge, size, shape, and friction coefficient. It also discusses the different types of electrophoresis and various supporting media that can be used, such as paper, cellulose acetate, agarose, and polyacrylamide gels.