Agarose Gel Electrophoresis for DNA and RNA Analysis is a fundamental technique used to separate nucleic acids based on size. DNA or RNA samples are loaded into wells of an agarose gel, and an electric current is applied, causing the negatively charged nucleic acids to migrate toward the positive electrode. Smaller fragments move faster through the gel matrix, allowing size-based separation. This method is widely used for checking the quality of nucleic acids, estimating fragment sizes, and analyzing PCR products, restriction digests, or RNA integrity in molecular biology labs.