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. |
The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms at that of:
1. Ascaris, a roundworm
2. Taenia, a tapeworm
3. Wuchereria, a filarial worm
4. Rhizopus, a mould
Which one of the following options gives the correct matching of a disease with its causative
organism and mode of infection:
Disease |
Causative Organisms |
Mode of Infection |
|
1. |
Malaria |
Plasmodium vivax |
Bite of male Anopheles mosquito |
2. |
Typhoid |
Salmonella typhi |
With inspired air |
3. |
Pneumonia |
Streptococcus pneumonia |
Droplet infection |
4. |
Elephantiasis |
Wuchereria bancrofti |
With infected water and food |
Common cold is not cured by antibiotics because it is:
1. not an infectious disease
2. caused by a virus
3. caused by a Gram-positive bacterium
4. caused by a Gram-negative bacterium
Which one of the following techniques is safest for the detection of cancers:
1. Radiography (X-ray)
2. Computed tomography (CT)
3. Histopathological studies
4. Magnetic resonance imaging (MRI)
A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when:
1. | the trophozoites reach maximum growth and give out certain toxins. |
2. | the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs. |
3. | the microgametocytes and megagametocytes are being destroyed by the WBCs. |
4. | the sporozoites released from RBCs are being rapidly killed and broken down inside the spleen. |
Which one of the following can not be used for preparation of vaccines against plague:
1. Avirulent live bacteria
2. Synthetic capsular polysaccharide material
3. Heat-killed suspensions of virulent bacteria
4. Formalin-inactivated suspensions of virulent bacteria
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 |