Which of the following immunoglobulins constitute the largest percentage in human milk?
1. IgD
2. IgM
3. IgA
4. IgG
Read the following four statements (I-IV):
I. | Colostrum is recommended for the newborn because it is rich in antigen |
II. | Chikungunya is caused by a Gram-negative bacterium |
III. | Tissue culture has proved useful in obtaining virus-free plants |
IV. | Beer is manufactured by distillation of fermented grape juice |
How many of the above statements are wrong?
1. Three
2. Four
3. One
4. Two
Which one of the following statements is correct with respect to immunity?
1. | The antibodies against smallpox pathogens are produced by T-lymphocytes |
2. | Antibodies are protein molecules each of which has four light chains |
3. | Rejection of a kidney graft is the function of B-lymphocytes |
4. | Preformed antibodies need to be injected to treat the bite by a viper snake |
Select the correct statement with respect to disease and immunisation:
1. | Injection of snake antivenom against snake bite is an example of active immunisation. |
2. | If due to some reason, B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen. |
3. | Injection of dead/inactivated pathogens causes passive immunity. |
4. | Certain protozoans have been used to mass produce hepatitis B vaccine. |
Cornea transplant in humans is almost never rejected. This is because:
1. its cells are least penetrable by bacteria
2. it has no blood supply
3. it is composed of enucleated cells
4. it is a non-living layer