MCQ on Antigen with Answers Pdf:
1. Any substance or molecules that interact with antibodies are called_____
(1) antigens
(2) immunogens
(3) epitope
(4) antibodies
Answer: 1
2. A pathogen can be a_______
(1) agent that causes a disease
(2) virus
(3) bacteria
(4) All of these
Answer: 4
3. B Cells are activated by___________
(1) Antibody
(2) Interferon
(3) Memory cells
(4) Antigen
Answer: 4
4. What antigen means?
(1) Any substance that causes the body to make an immune response against that substance.
(2) Any substance that causes the body to make an immune response against self part.
(3) Both
(4) None of these
Answer: 1
5. Agglutination reaction is more sensitive than precipitation for the detection of________
(1) antigens
(2) antibodies
(3) complement
(4) Antigen-antibody complexes
Answer: 1
6. Antigens can be made up of_________
(1) Nucleic acids
(2) carbohydrates
(3) proteins
(4) all of these
Answer: 4
7. For specific antigen recognition by T cells________
(1) antigen is bound by a T cell membrane antibody
(2) denaturation of antigen does not reduce epitope recognition
(3) MHC molecules are not required
(4) antigen exposure during T cell maturation is required
Answer: 2
8. Antigen, when injected in the body activates its specific lymphocytes in the________
(1) blood circulation
(2) draining lymph nodes
(3) MALT (mucosa associated
(4) spleen lymphoid tissue
Answer: 2
9. Which of the following is incorrect with regard to antigen epitopes?
(1) An epitope may be shared by two different antigens
(2) A protein molecule usually contains multiple epitopes
(3) B cells bind only processed antigen epitopes
(4) Epitopes may be linear or assembled
Answer: 3
10. Which of the following statement is correct for incomplete antigens________
(1) are also called as haptens
(2) are immunogenic upon binding covalently to a carrier protein
(3) cannot induce antibody production by itself
(4) all of the above
Answer: 4
11. Lymphocytes are activated by antigen in the__________
(1) blood stream
(2) bone marrow
(3) liver
(4) lymph nodes
Answer: 4
12. The ability of the immune system to recognize self-antigens versus nonself antigen is an example of_______
(1) Specific immunity
(2) Tolerance
(3) Cell-mediated immunity
(4) Antigenic immunity
(5) Humoral immunity
Answer: 2
13. Which of the following statements is not correct for antigen________
a) inducing an immune response
b) can interact with antibodies
c) induces antibody production
d) mostly antigens are harmless
Answer: 4