AIDS is caused by HIV that principally infects
All lymphocytes
Activator $B$ cells
$T_4$ lymphocytes
Cytotoxic $T$ cells
When the children without $T-$ cells and $B-$ cells are kept in germ free isolation suits, then the disease is
The human liver fluke depends on how many intermediate host or vectors ?
Identify the wrongly matched pair.
Motile elongate zygote of Plasmodium occurs in
Match the columns :
Column - $I$ | Column - $II$ |
$(a)$ Pre erythrocytiC cycle | $(1)$ Meta cryptomerozoites enters RBC and becomes spherical in shape. |
$(b)$ Exo-erythrocyticcycle | $(2)$ sporozoites in saliva are introduced to human blood |
$(c)$ Endo-erythrocytic cycle | $(3)$ Breaks the liver cells and comes our of blood. |