Match the following columns
Column $-I$ | Column $-II$ |
$(A)$ Physical barriers | $(1)$ Interferon |
$(B)$ Physiological barriers | $(2)$ Leukocytes |
$(C)$ Cellular barriers | $(3)$ Tears |
$(D)$ Cytokinin barriers | $(4)$ skin |
$A$ $B$ $C$ $D$
$3$ $2$ $1$ $4$
$2$ $1$ $4$ $3$
$1$ $4$ $3$ $2$
$4$ $3$ $2$ $1$
Many microbial pathogens enter the gut of humans along with food. What are the preventive barriers to protect the body from such pathogens ? What type of immunity do you observe in this case ?
$B$-cells are lymphocytes which produce the humoral immunity. These cells are produced by
Assertion : Interferons are effective against viruses.
Reason : Proteins which can be synthesized only by genetic engineering are effective against viruses.
Passive immunity can be obtained by injecting
What is interferon