Answer: B lymphocytes.
- A B lymphocytes
- B red blood cells
- C blood platelets
- D nerve cells
Correct answer: A. B lymphocytes
Explanation: B lymphocytes (B cells) produce antibodies against antigens.
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.