Q. No.What will be true for the given diagram?
I: A is thymus and it is a secondary lymphoid organ.
II: B is MALT and is a primary lymphoid organ.
Options:
1.
Only I
2.
Only II
3.
Both I and II
4.
Neither I nor II
II: B is MALT and is a primary lymphoid organ.
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| I: | The primary lymphoid organs are where immature lymphocytes differentiate into antigen sensitive lymphocytes. |
| II: | The thymus is quite small at the time of birth and keeps increasing in size with age. |
| III: | Antigens trapped in the lymph nodes are responsible for the activation of lymphocytes present there and cause the immune response. |
2. Only Statement I and Statement III
3. Only Statement II and Statement III
4. Statement I, Statement II and Statement III
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| I. | AIDS is a congenital disease |
| II. | Syndrome means a group of symptoms |
| III. | HIV is a rotavirus |
| IV. | HIV does not have an envelope |
| V. | HIV can be transmitted by an infected mother to her child through placenta |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
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| Assertion (A): | HIV/Aids infected persons should not be isolated from family and society. |
| Reason (R): | There is a time-lag of a few months to many years [usually 5-10 years] between infection and the appearance of AIDS symptoms. |
| 1. | Both (A) and (R) are false. |
| 2. | Both (A) and (R) are true and (R) explains (A). |
| 3. | Both (A) and (R) are true but (R) does not correctly explain (A). |
| 4. | (A) is true but (R) is false. |
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| I: | HIV first enters into the macrophages. |
| II: | Macrophages are used by HIV as a factory to produce more virus particles. |
| III: | The viral cDNA does not get integrated into any cells in the human body. |
| IV: | HIV also enters the T-helper cells and destroys them. |
| V: | The anti-retroviral treatment for AIDS is completely curative. |
| 1. | All except V | 2. | Only III and V |
| 3. | Only I, III and IV | 4. | All |
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| I: | Almost all carcinogens are mutagens. |
| II: | X-rays and Gamma rays are non-ionising. |
| III: | UV rays are ionising radiations. |
1. Only I is correct
2. Only II and III are correct
3. Only III is correct
4. I, II, and III are correct
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| Assertion (A): | Early detection of cancer is essential for a favourable prognosis. |
| Reason (R): | Early detection allows the disease to be treated successfully in many cases. |
| 1. | Both (A) and (R) are true and (R) correctly explains (A). |
| 2. | Both (A) and (R) are false. |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are true but (R) does not explain (A). |
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| 1. | Leukaemias are diagnosed by blood and bone marrow tests. |
| 2. | CT scan uses X rays. |
| 3. | MRI uses ionising radiation and strong magnetic fields. |
| 4. | Antibodies against cancer-specific antigens can be used for the detection of certain cancers. |
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| Assertion (A): | Biological response modifiers like alpha interferon can help detection and destruction of tumour cells by the immune system. |
| Reason (R): | Such biological response modifiers activate the immune system of the patient. |
| 1. | Both (A) and (R) are True but (R) does not explain (A). |
| 2. | Both (A) and (R) are False. |
| 3. | Both (A) and (R) are True and (R) correctly explains (A). |
| 4. | (A) is True but (R) is False. |
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| Assertion (A): | Smoking causes oxygen deficiency in the body. |
| Reason (R): | Smoking increases the concentration of haembound oxygen. |
| 1. | Both (A) and (R) are false. |
| 2. | (A) is true but (R) is false. |
| 3. | Both (A) and (R) are true and (R) correctly explains (A). |
| 4. | Both (A) and (R) are true but (R) does not explain (A). |
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