Gel electrophoresis is a method that is widely used in laboratories to separate the protein moles such as DNA and RNA based on their size, density, and type. When an electric current is passed, the entire charged molecules move through the gel. The term ‘migration’ is used for the movement of the charged molecules. Gel electrophoresis is a technique that is used to analyze DNA. Agarose gel electrophoresis is an effective way to separate the fragments of the protein molecule called DNA based on its size. Before the adaptation of the agarose gel, DNA was separated using sucrose density gradient centrifugation. Agarose gel electrophoresis has advanced the process of separating DNA.