| List-I | List-II | ||
| A. | Malignant tumors | I. | Destroy tumors |
| B. | MALT | II. | AIDS |
| C. | NACO | III. | Metastasis |
| D. | α - Interferons | IV. | Lymphoid tissue |
| 1. | A-III, B-IV, C-II, D-I | 2. | A-IV, B-III, C-II, D-I |
| 3. | A-III,B-IV ,C-I, D-II | 4. | A-III, B-I,C-IV ,D-II |
| 1. | Eosinophils | 2. | TH cells |
| 3. | B-lymphocytes | 4. | Basophils |
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 |
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 - Plymphocytes. |
| 4. | When the viral DNA is produced by reverse transcriptase. |