Answer: Thymus.
- A Bone marrow
- B Thymus
- C Spleen
- D Lymph nodes
Correct answer: B. Thymus
Explanation: T lymphocytes (T cells) mature in the Thymus gland, located in the chest. The 'T' in T cell stands for Thymus. B cells mature in Bone marrow (the 'B' stands for Bursa/Bone marrow).
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.