In an antibody molecule, an antigen binding site is located:
1. In the constant portion
2. At the C – terminus of a heavy chain
3. Between a light and a heavy chain
4. Between two heavy chains
Active immunity develops when:
1. | A host is exposed to antigens |
2. | Antigen presenting cells first encounter the antigen |
3. | T helper cells activate B cells to produce antibodies |
4. | When a child gets vaccinated for the first time |
A foetus receiving some antibodies from mother through placenta is an example of:
1. | Naturally acquired active immunity |
2. | Artificially acquired active immunity |
3. | Artificially acquired passive immunity |
4. | Naturally acquired passive immunity |
The principle of immunization or vaccination is based on which property of the immune system?
1. Specificity
2. Memory
3. Ability to recognize self from non-self
4. Cooperation between innate and adaptive immunity
What type of immunity is used in the treatment of a patient of snakebite?
1. | Naturally acquired active immunity |
2. | Artificially acquired active immunity |
3. | Artificially acquired passive immunity |
4. | Naturally acquired passive immunity |
A drug that would not be helpful in the treatment of allergies is:
1. | Antibiotics | 2. | Antihistaminics |
3. | Steroids | 4. | Adrenaline |
1. | Bone marrow & Spleen | 2. | Bone marrow & Thyroid |
3. | Lymph nosed & Spleen | 4. | Bone marrow & thymus |
Secondary lymphoid organs:
1. | Are those where immature lymphocytes differentiate |
2. | Provide a site of interaction between lymphocytes and antigens |
3. | Are formed after birth |
4. | Are bone marrow and MALT |
Which of the following is not a function of spleen?
1. | It acts as a filter of the blood by trapping blood-borne microorganisms |
2. | It acts as a large reservoir of RBCs |
3. | It filters our old RBCs |
4. | It continues to form RBCs for a few years after birth |
What constitutes about 50% of the lymphoid tissue in the human body?
1. | Malt | 2. | Spleen |
3. | Lymph nodes | 4. | Liver |