At which stage of HIV infection does one usually show symptoms of AIDS? (a) Within 15 … ) When the viral DNA is produced by reverse…
The correct option is (c) When HIV damages large number of helper T-lymphocytes. Explanation:
T-lymphocyte receptors can recognise only antigen that bound to cell membrane proteins These lymphocytes mediate CMI (cell mediated immunity). B-lymphocytes are the major effector molecules of humoral immunity. Erythrocytes are red blood cells. Thrombocytes or platelets secrete factors, that are involved in vascular repair.