Antigen problems
- 1. Which of the following is incorrect with regard to antigen epitopes?
Options- A. An epitope may be shared by two different antigens
- B. A protein molecule usually contains multiple epitopes
- C. B cells bind only processed antigen epitopes
- D. Epitopes may be linear or assembled Discuss
Correct Answer: B cells bind only processed antigen epitopes
- 2. Very low doses of antigen may induce
Options- A. hypersensitivity
- B. immunological ignorance
- C. low zone tolerance
- D. low zone immunity Discuss
Correct Answer: low zone tolerance
- 3. CD antigens
Options- A. allow leukocytes to recognize antigen
- B. are each expressed on only one cell type
- C. are expressed on immune cells to mark them for separation
- D. function as receptors for cytokine and CAMs Discuss
Correct Answer: function as receptors for cytokine and CAMs
- 4. A molecule that can be covalently linked to a non-immunogenic antigen to make it an immunogen is called a (n)
Options- A. adjuvant
- B. carrier
- C. hapten
- D. mitogen Discuss
Correct Answer: carrier
- 5. The ability of an antigen to induce an immune response does not depend on the antigen's
Options- A. ability to enter the thyroid
- B. degree of aggregation
- C. dose
- D. size Discuss
Correct Answer: ability to enter the thyroid
- 6. During the lag period between antigen contact and detection of adaptive immunity,
Options- A. antigen is hidden from the immune system in macrophages
- B. innate immune effectors are eliminating antigen
- C. innate immunity blocks the activation of adaptive immune effector cells
- D. new B and T cells with the appropriate antigen specificity must be produced in the bone marrow Discuss
Correct Answer: innate immune effectors are eliminating antigen
- 7. For specific antigen recognition by T cells,
Options- A. antigen is bound by a T cell membrane antibody
- B. denaturation of antigen does not reduce epitope recognition
- C. MHC molecules are not required
- D. antigen exposure during T cell maturation is required Discuss
Correct Answer: denaturation of antigen does not reduce epitope recognition
- 8. A pathogen can be a (n)
Options- A. agent that causes a disease
- B. virus
- C. bacteria
- D. All of these Discuss
Correct Answer: All of these
- 9. The antibiotic penicillin is a small molecule that does not induce antibody formation. However, penicillin binds to serum proteins and forms a complex that in some people induces antibody formation resulting in an allergic reaction. Penicillin is therefore
Options- A. an antigen
- B. a hapten
- C. an immunogen
- D. both an antigen and a hapten Discuss
Correct Answer: both an antigen and a hapten
- 10. Antigen, when injected in the body activates its specific lymphocytes in the
Options- A. blood circulation
- B. draining lymph nodes
- C. MALT (mucosa associated
- D. spleen lymphoid tissue Discuss
Correct Answer: draining lymph nodes
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