Q. No.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.
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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At which stage of HIV infection does one usually show symptoms of AIDS?
| 1. | Within 15 days of sexual contact with an infected person |
| 2. | When the infected retrovirus enters host cells |
| 3. | When HIV damages a large number of helper T-Lymphocytes |
| 4. | When the viral DNA is produced by reverse transcriptase |
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HIV that causes AIDS, first starts destroying:
1. Leucocytes
2. Helper T-Lymphocytes
3. Thrombocytes
4. B-Lymphocytes
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Which of the following immunoglobulins does constitute the largest percentage in human milk?
1. Ig M
2. Ig A
3. Ig G
4. Ig D
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The active form of Entamaeba-histolytica feeds upon:
1. mucosa and submucosa of colon only
2. food in intestine
3. blood only
4. erythrocytes; mucosa and submucosa of colon
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