Q: What do you call large, y-shaped proteins that recognize and bind to antigens?


Read this paragraph and choose the correct option from the provided answers:

Plasma cells are activated B cells that secrete antibodies. Antibodies are large, Y-shaped proteins that recognize and bind to antigens. Plasma cells are like antibody factories, producing many copies of a single type of antibody. The antibodies travel throughout the body in blood and lymph. Each antibody binds to just one kind of antigen. When it does, it forms an antigen-antibody complex (see Figure below ). The complex flags the antigen-bearing cell for destruction by phagocytosis .

 Choices:

- proteins

- membranes

- parasites

- antibodies


A:
antibodies