The complexity of our immune system mainly depends on the immune cells such as the B cells, T cells, various antibodies, and other cells. As soon as the foreign molecule or a microbe enters the body, our immune system gets activated. The soldiers of the immune system, mainly the immune cells and the antibodies come forward and activate a cascade of mechanisms involved in killing the foreign particles and the microbes. They not only eliminate the microbe from the body but also remember it as an enemy, so that when the same microbe re-enters next time, they easily eliminate it. The antibodies usually denoted as Y-shaped molecules, bind to the antigens and help in eliminating them. The antibodies exhibit diverse nature and their synthesis completely depends on certain gene expressions. These antibodies show receptors specific to the antigens. Although there are few genes in the human body, the antibodies have very diverse receptors. Hence, they identify many different types of antigens.