Question

cytotoxic t cells can attack ____________.select all that apply. a antigen - bearing cells b viral - infected cells c cancerous cells d antibodies

Explanation:

Cytotoxic T cells (also known as CD8+ T cells) are a type of T lymphocyte that plays a key role in the immune response. They can recognize and attack cells that display foreign antigens on their surface.

• Option A: Antigen - bearing cells present antigens, and cytotoxic T cells can attack these cells as they recognize the foreign antigens.
• Option B: Viral - infected cells display viral antigens on their surface. Cytotoxic T cells can detect these antigens and attack the infected cells to eliminate the virus - infected cells.
• Option C: Cancerous cells often display abnormal antigens (tumor - associated antigens) on their surface. Cytotoxic T cells can recognize these abnormal antigens and attack the cancerous cells as part of the immune surveillance against cancer.
• Option D: Antibodies are proteins produced by B cells. Cytotoxic T cells do not attack antibodies; they target cells, not free - floating antibody molecules.

Answer:

A. antigen - bearing cells, B. viral - infected cells, C. cancerous cells