Question

Formation of antibodies is the function of
A. Monocytes
B. Neutrophils
C. Basophils
D. Lymphocytes

Answer 1

Hint: The immune system consists of innate immunity and acquired immunity. Antibodies are the proteins created by the acquired immune system to fight pathogens that cause diseases in our body.

Complete step by step answer:
The lymphocytes are the type of white blood cells that have a major role in providing immunity to our body. They are agranulocytes and are produced from bone marrow. Lymphocytes are of two types. They are B lymphocytes and T lymphocytes.
1. B lymphocytes are those who provide us with humoral immunity. They produce several antibodies that have the ability to fight disease-causing pathogens. Antibodies are actually protein molecules and consist of two heavy chains and two light chains. They are antigen specific and contain an antigen binding site. These B lymphocytes have many receptors that are activated when antigens bind to them.
2. Cell mediated immune response is the other type of acquired immunity. It is provided by T lymphocytes. These cells are born from the thymus and get differentiated when they come in contact with an antigen. These cells need to be activated and it is done by an antigen presenting cell that presents antigen to the T lymphocytes. This type of cells helps to differentiate between own body cells and foreign particles. So, they are significant in graft rejection during organ transplantation.
Hence the correct option is D.

Note: Our body can reject a foreign tissue entering the body. So, several compatibility tests have to be done before organ transplantation. The tissue may get rejected by our immune system and in order to prevent this, immunosuppressive drugs are administered to the patients undergoing organ transplantation.