Which of the following is not a key antibody function?ANSWERNeutralizationPrecipitationPhagocytosisOpsonization

The function that is not a key antibody function among the options provided is Phagocytosis. This is a process carried out by cells (like macrophages) in the immune system where they engulf and destroy pathogens and cellular debris. Antibodies, on the other hand, do not perform this function. They can, however, bind to pathogens and mark them for phagocytosis in a process known as opsonization. Other key functions of antibodies include neutralization, where they bind to a pathogen and stop it from infecting cells, and precipitation, where they cause pathogens to clump together so they can be more easily destroyed by immune cells.