You use agarose gel electrophoresis to confirm that your cloning experiment successfully produced a recombinant plasmid carrying the mutant PKD1 DNA sequence. The pre-cast gel that you utilise for agarose electrophoresis includes a positively charged electrode (anode) at one end and a negatively charged electrode (cathode) at the opposite end. Do you expect DNA molecules to migrate towards the anode or cathode when an electric current is applied to the gel? Explain your response.