Correct option is (B) Anode
Electrophoresis is a technique used in laboratories to separate macromolecules based on size. An electric current is used to move the DNA molecules across a gel. DNA fragments are negatively charged, therefore, when an electric current is applied, DNA fragments will move towards the pole that has a positive charge.
In electrophoresis, the electrodes are termed anode and cathode. The anode is the electrode where oxidation occurs and it has a positive charge. The cathode is the electrode where reduction occurs and it has a negative charge. As DNA fragments are negatively charged, they will move towards the positive electrode.
The DNA fragments in electrophoresis move towards the anode due to their negative charge.
