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Antigen Online Exam Quiz

Important questions about Antigen. Antigen MCQ questions with answers. Antigen exam questions and answers for students and interviews.

1. Lymphocytes are activated by antigen in the


A : blood stream

B : bone marrow

C : liver

D : lymph nodes

2. A virus vaccine that can activate cytotoxic T cells must contain


A : a high dose of virus particles

B : an adjuvant to stimulate T cell division

C : live virus

D : virus peptides

1. Which of the following is incorrect with regard to antigen epitopes?


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

2. Very low doses of antigen may induce


A : hypersensitivity

B : immunological ignorance

C : low zone tolerance

D : low zone immunity

3. CD antigens


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

4. A molecule that can be covalently linked to a non-immunogenic antigen to make it an immunogen is called a ( n )


A : adjuvant

B : carrier

C : hapten

D : mitogen

5. The ability of an antigen to induce an immune response does not depend on the antigen's


A : ability to enter the thyroid

B : degree of aggregation

C : dose

D : size

6. During the lag period between antigen contact and detection of adaptive immunity,


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

7. For specific antigen recognition by T cells,


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

8. A pathogen can be a ( n )


A : agent that causes a disease

B : virus

C : bacteria

D : 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


A : an antigen

B : a hapten

C : an immunogen

D : both an antigen and a hapten

10. Antigen, when injected in the body activates its specific lymphocytes in the


A : blood circulation

B : draining lymph nodes

C : MALT (mucosa associated

D : spleen lymphoid tissue

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