Answer: Phagocytes.
- A Red blood cells
- B Blood platelets
- C Nerve cells
- D Phagocytes
Correct answer: D. Phagocytes
Explanation: Phagocytes such as neutrophils and macrophages engulf and destroy pathogens by phagocytosis.
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.