Q. No.Which of the following is a pair of viral diseases?
1. Ringworm, AIDS
2. Common cold, AIDS
3. Dysentery, common cold
4. Typhoid, tuberculosis
AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?
1. Transfusion of contaminated blood
2. Sharing the infected needles
3. Shaking hands with infected persons
4. Sexual contact with infected persons
Which of the following is correct regarding AIDS causative agent HIV?
| 1. | HIV is an enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase |
| 2. | HIV is an enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase |
| 3. | HIV is an unenveloped retrovirus |
| 4. | HIV does not escape but attacks the acquired immune response |
Which of the following statements is not true for retroviruses?
| 1. | Retroviruses carry the gene for RNA-dependent DNA polymerase |
| 2. | The genetic material in mature retroviruses is RNA |
| 3. | Retroviruses are causative agents for certain kinds of cancer in man |
| 4. | DNA is not present at any stage in the life cycle of retroviruses. |
AIDS is caused by HIV that principally infects:
1. Activator B cells
2. T4 lymphocytes
3. Cytotoxic T cells
4. All lymphocytes
HIV that causes AIDS first starts destroying:
1. B-lymphocytes
2. leucocytes
3. thrombocytes
4. helper T-lymphocytes
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. |
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