<prompt> DNA restriction fragments are separated byPaper chromatographyAgarose gel electrophoresisThin-layer chromatographyUltracentrifugation  <response>: Typically, a DNA molecule is digested with restriction enzymes, and the agarose gel electrophoresis is used as a diagnostic tool to visualize the fragments. An electric current is used to move the DNA molecules across an agarose gel, which is a polysaccharide matrix that functions as a so of sieve. Ref-D.M.Vasudevan 7e p479 