NEET BIOLOGY

Detailed explanation-1: -Synthesized exclusively by B cells, antibodies are produced in billions of forms, each with a different amino acid sequence and a different antigen-binding site.

Detailed explanation-2: -There are two main types of lymphocytes: B cells and T cells. The B cells produce antibodies that are used to attack invading bacteria, viruses, and toxins.

Detailed explanation-3: -Solution : B-lymphocytes their prinicipal function is to make antibodies againts soluble antigens thet are important in regulating humoral immunty. On the other hand RBCs transport oxygen, t-lymphocytes play central role in cell mediated immunity and neutrophils acts as phagocytes.

Detailed explanation-4: -Helper T cells stimulate the B cell through the binding of CD40L on the T cell to CD40 on the B cell, through interaction of other TNF-TNF-receptor family ligand pairs, and by the directed release of cytokines.

Detailed explanation-5: -B cells have B cell receptors (BCRs) on their surface, which they use to bind to a specific protein. Once the B cells bind to this protein, called an antigen, they release antibodies that stick to the antigen and prevent it from harming the body. Then, the B cells secrete cytokines to attract other immune cells.