Answer: T cells.
- A Red blood cells
- B Blood platelets
- C T cells
- D Mast cells
Correct answer: C. T cells
Explanation: B lymphocytes make antibodies and T lymphocytes mediate cell-mediated immunity.
An antibody is Y-shaped, with two identical antigen-binding sites at the tips of the variable regions - each shaped to recognise one specific antigen - while the constant (Fc) region at the base is recognised by immune cells to trigger further responses.
Concept context
Innate and adaptive immunity, B cells, T cells, antibodies, vaccines, and immune disorders. Critical for NEET.