Question

Which statement is true about T cells and their recognition of antigens?

A. T cells do not recognize antigens.
B. T cells recognize antigens even when they are not exposed on the cell's surface.
C. T cells only recognize antigens on the cell's surface.
D. T cells are not involved in antigen recognition.

Answer 1

True statement: T cells only recognize antigens presented on the cell's surface within major histocompatibility complex molecules.

Step-by-step explanation:

The statement that is true about T cells and their recognition of antigens is: T cells only recognize antigens on the cell's surface. T cells utilize their antigen receptor, which is a complex of two protein chains on their surface, to recognize antigens. The recognition process is specific to antigens that are foreign to the body and does not include self-antigens. T cells cannot recognize antigens without them being presented on the surface of cells within major histocompatibility complex (MHC) molecules. There are distinct roles for different types of T cells, with helper T cells aiding in the activation of other immune cells, regulatory T cells maintaining immune tolerance, and cytotoxic T cells destroying infected or malignant cells.