6. Which of the following are responsible for immune specificity?

A. Antigens
B. Antibodies
C. T lymphocytes
D. Macrophage

7. Which species lack immunoglobulin light chains?

A. Camels
B. Humans
C. cows
D. Buffalo

8. Monoclonal refers to

A. a single clone of antibody-producing cells
B. all the antibody molecules which are identical
C. the binding with same antigenic site with identical binding affinities
D. all of the above

9. β-Lymphocytes are often called simply

A. B cells
B. T cells
C. T Lymphocytes
D. none of these

10. IgE provides

A. immunity against some parasites
B. complement killings of the cells and phagocytosis
C. secretions in the body
D. all of the above