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Q. No.Assertion (A): Bone marrow and thymus gland are primary lymphoid organs
Reason (R): Bone marrow and thymus provide the sites for interaction of lymphocytes with the antigen, which proliferate to become effector cells.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Human Immune System |
64%
From NCERT
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Assertion (A): AIDS patients suffer from infections due to Mycobacterium, viruses, fungi and even parasites like Toxoplasma.
Reason (R): AIDS causes progressive decrease in the number of helper T-lymphocytes.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): AIDS causes progressive decrease in the number of helper T-lymphocytes.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: AIDS |
81%
From NCERT
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Assertion (A): IgA provides immunity against inhaled and ingested pathogens
Reason (R): IgA is secretory antibody and it is present in the lining of respiratory and intestinal tract.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): IgA is secretory antibody and it is present in the lining of respiratory and intestinal tract.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Details of Immunity |
53%
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Common cold:
| 1. | is caused by a bacterium |
| 2. | affects lungs very early in the disease |
| 3. | is not transmitted by droplets resulting from the cough or sneezes of an infected person |
| 4. | can be transmitted through contaminated objects such as pens, books, cups, doorknobs, computer keyboard or mouse, etc. |
Subtopic: Common Cold & Malaria Introduction |
91%
From NCERT
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The given figure shows the chemical structure of a commonly abused drug. This drug:
| 1. | causes hallucinations in low doses |
| 2. | is derived from the Indian hemp plant |
| 3. | is sometimes clinically used as a pain killer |
| 4. | is a CNS stimulant |
Subtopic: Drugs & Alcohol Abuse |
78%
From NCERT
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Symptoms like constipation, abdominal pain and cramps, stools with excess mucous and blood clots are commonly seen in:
1. Amoebic dysentery
2. Ascariasis
3. Typhoid
4. Cholera
1. Amoebic dysentery
2. Ascariasis
3. Typhoid
4. Cholera
Subtopic: Amoebiasis |
81%
From NCERT
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The T-cells:
I: themselves do not secrete antibodies
II: help B cells to produce antibodies
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: themselves do not secrete antibodies
II: help B cells to produce antibodies
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Details of Immunity |
91%
From NCERT
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The first form of milk produced by the mammary glands of humans immediately following delivery of the newborn is rich in:
1. IgA antibodies
2. IgG antibodies
3. IgM antibodies
4. IgE antibodies
Subtopic: Active & Passive Immunity |
93%
From NCERT
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Opportunistic infections like tuberculosis and toxoplasmosis are seen in HIV positive patients when:
| 1. | The B – lymphocyte counts becomes excessive |
| 2. | The phagocytic cells stop functioning |
| 3. | The T helper cell count gets very low |
| 4. | The body starts making a large number of antibodies against HIV |
Subtopic: AIDS |
94%
From NCERT
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The fungal Genus not responsible for causing ringworm in humans will be:
1. Microsporum
2. Trichophyton
3. Epidermophyton
4. Trichoderma
1. Microsporum
2. Trichophyton
3. Epidermophyton
4. Trichoderma
Subtopic: Fungal Infection & Concept of Immunity |
86%
From NCERT
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