Rejection of a kidney graft is the function of B-lymphocytes.

Preformed antibodies need to be injected to treat the bite by a viper snake.

The antibodies against small pox pathogen are produced by T – lymphocytes

Antibodies are protein molecules, each of which has four light chains.

Human liver

Salivary glands of Anopheles

Human RBCs

Gut of female Anopheles

Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease

Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine

Pneumonia is caused by a virus while the common cold is caused by the bacterium haemophilus influenzae

Pneumonia pathogen infects alveoli wheras the common cold affects nose and respiratory passage but not the lungs

They do not remain confined in the area of formation

They divide in an uncontrolled manner

They compete with normal cells for vital nutrients

They show contact inhibition