Q. No.Common cold is not cured by antibiotics because it is
1. caused by a virus
2. caused by a Gram-positive bacterium
3. caused by a Gram-negative bacterium
4. not an infectious disease
1. caused by a virus
2. caused by a Gram-positive bacterium
3. caused by a Gram-negative bacterium
4. not an infectious disease
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Select the correct statement with respect to diseases and immunisation?
| 1. | If due to some reason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen |
| 2. | Injection of dead / inactivated pathogens causes passive immunity |
| 3. | Certain protozoans have been used to mass produce hepatitis B vaccine. |
| 4. | Injection of snake antivenom against snake bite is an example of active immunisation |
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Motile zygote of Plasmodium occurs in
1. Gut of female Anolpheles
2. Salivary glands of Anopheles
3. Human RBCs
4. Human liver
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Common cold differs from pneumonia in, that:
| 1. | Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease |
| 2. | Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine |
| 3. | Pneumonia is caused by a virus while the common cold is caused by the bacterium Haemophilus influenzae |
| 4. | Pneumonia pathogen infects alveoli whereas the common cold affects the nose and respiratory passage but not the lungs |
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Which one of the following is not a property of cancerous cells whereas, the remaining three are?
1. They compete with the normal cells for vital nutrients.
2. They do not remain confined in the area of formation.
3. They divide in an uncontrolled manner.
4. They show contact inhibition.
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Which one of the following statements is correct with respect to immunity?
| 1. | Preformed antibodies need to be injected to treat the bite by a viper snake. |
| 2. | The antibodies against smallpox pathogen are produced by T - lymphocytes. |
| 3. | Antibodies are protein molecules, each of which has four light chains. |
| 4. | Rejection of a kidney graft by the recipient is the function of B-lymphocytes. |
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Cirrhosis of liver is caused by the chronic intake of
1. Opium
2. Alcohol
3. Tobacco (Chewing)
4. Cocaine
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| (a) |  |
| (b) |  |
| Molecule | Source | Use | |
| 1. | (a) Cocaine | Erythroxylum coca | Accelerates the transport of dopamine |
| 2. | (b) Heroin | Cannabis Sativa | Depressant and slows down body functions |
| 3. | (b) Cannabinoid | Atropa belladonna | Produces hallucinations |
| 4. | (a) Morphine | Papaver somniferum | Sedative and painkiller |
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Infection of Ascaris usually occurs by
1. Eating imperfectly cooked pork.
2. Tse - tse fly.
3. mosquito bite.
4. drinking water containing eggs of Ascaris
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The cell-mediated immunity inside the human body is carried out by
1. B-lymphocytes
2. Thrombocytes
3. Erythorcytes
4. T-lymphocytes
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