Answer: Globulins.
- A Albumins
- B Globulins
- C Fibrinogens
- D Histones
Correct answer: B. Globulins
Explanation: Antibodies are gamma-globulins (immunoglobulins), one of the globulin fractions of blood plasma proteins.
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.