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 |
Which one of the following statements is correct with respect to AIDS?
| 1. | HIV can be transmitted through eating food together with an infected person. |
| 2. | Drug addicts are the least susceptible to HIV infection. |
| 3. | AIDS patients are being fully cured cent per cent with proper care and nutrition. |
| 4. | The causative HIV retrovirus enters helper T-lymphocytes thus reducing their numbers. |
Which one of the following is a pair of viral diseases?
1. Ringworm, AIDS
2. Common Cold, AIDS
3. Dysentery, common cold
4. Typhoid, Tuberculosis