Question

QUESTION 14 Clonal selection results in production of: Plasma cells Оа Both plasma cells and memory cells b. Cc Memory cells Antigen presenting cells QUESTION 15 Which acquired immune cells are involved in cell-mediated immunity and destroy virally infected cells through direct contact? a. plasma B cells b.cytotoxic T cells c. helper T cells d. macrophages QUESTION 16

Answer 1

ANS 14: OPTION B,Clonal selection result in the production of Plasma cell and memory cell

plasma cell produce antibody molecule ,B cells differentiate into plasma membrane .These B cells secrete antibodies again antigen ,develop into memory after the interaction with antigen.clonal selection amplified or differentiation of antigen specific lymphocytes into memory or effector cells .Memory cells are live long time and clonal cell responsible for the elimination of antigen.

Ans: OPTION B ,cytotoxic T cells destroy virus infected cells.

Human has a innate immune system that provide protection against infection.

Presence of specific protein called T cell receptors on the surface of cytotoxic T cells ,identify the virally infected cell.t cell receptor releases perforin and cytotoxin. Perforin make pore in the infected cell's membrane and then cytotoxin go inside he infected cell and then kill them.cytotoxin T cell provide defense against the intracellular pathogens that reproduce or divide inside the cell.