Question

______ would be a target of an effector cytotoxic T-cell.

Options

• extracellular virus particles in blood

• a virus-infected body cell or tumour cell

• parasitic flukes in the liver

• bacterial cells in pus

Answer 1

A virus-infected body cell or tumour cell would be a target of an effector cytotoxic T-cell.

Explanation:

Effector cytotoxic T-cells specifically target and destroy virus-infected body cells or tumor cells by recognizing antigenic peptides presented on their surface within MHC class I molecules. They do not target extracellular virus particles, parasitic flukes, or bacterial cells directly. Instead, extracellular pathogens may be targeted by antibodies or phagocytes, not by cytotoxic T-cells.