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Home Biochemistry Antigen Comments

  • Question
  • 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

  • Correct Answer
  • denaturation of antigen does not reduce epitope recognition 


  • Antigen problems


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    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. Very low doses of antigen may induce

    • Options
    • A. hypersensitivity
    • B. immunological ignorance
    • C. low zone tolerance
    • D. low zone immunity
    • Discuss
    • 6. A pathogen can be a (n)

    • Options
    • A. agent that causes a disease
    • B. virus
    • C. bacteria
    • D. All of these
    • Discuss
    • 7. 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
    • 8. 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
    • 9. Lymphocytes are activated by antigen in the

    • Options
    • A. blood stream
    • B. bone marrow
    • C. liver
    • D. lymph nodes
    • Discuss
    • 10. A virus vaccine that can activate cytotoxic T cells must contain

    • Options
    • A. a high dose of virus particles
    • B. an adjuvant to stimulate T cell division
    • C. live virus
    • D. virus peptides
    • Discuss


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