How do monoclonal antibodies function in the immune response?

• A. By blocking the entire immune system
• B. By targeting specific antigens and marking them for destruction
• C. By increasing blood flow to infected areas
• D. By producing additional antibodies

Answer: (B)

Monoclonal antibodies function by targeting specific antigens present on pathogens or diseased cells. They are designed to bind precisely to these antigens, which marks them for destruction by the immune system. This targeted approach enhances the body's ability to recognize and eliminate harmful invaders, such as viruses and cancer cells. Once the monoclonal antibodies bind to their specific targets, they can also recruit other components of the immune system, such as phagocytes, to facilitate the destruction of the marked cells.

The specific design of monoclonal antibodies allows for a focused immune response, distinguishing them from other options that either do not engage in this precise targeting or have different mechanisms of action entirely.