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Immunology Exam Questions Sample
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Immunology Exam Questions Sample
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Immunology MCQ exam1. All of the following are true with respect to IgM antibodies EXCEPT which one
A. they fix complement
B. they occur on the surface of lymphocytes
C. they predominate in the primary response to antigen
D. they are glycoproteins
E. they mediate allergic reaction
2. One principal function of complement is to
A. inactivate perforins
B. mediate the release of histamine
C. Bind antibodies attached to cell surfaces and to lyse these cells
D. phagocytize antigens
E. cross link allergens
3. One principal function of the Class I and Class II major histocompatibility
complex S proteins is to
A. transduce the signal to the T-cell interior following antigen binding
B. mediate immunoglobulin class switching
C. present antigen for recognition by the T-cell antigen receptor
D. stimulate production of interleukins
E. bind complement
4. The major role of the complement system is to work in conjunction with
A. antibodies to lyse cells via the C8 and C9 components
B. the major histocompatibility complex for cell recognition
C. antibodies to opsonize cells
D. the T-cell receptor for production of lymphokines
E. antibodies to lyse cells via the perforin molecules
5. T-cell antigen receptors are distinguished from antibodies by which of the
following
A. T-Cell receptors are glycosylated
B. T-cell receptors must interact with antigen uniquely presented by other cells
but not with free antigen
C. T-Cell receptors bind various cytokines
D. T-Cell receptors bind complement to lyse cells
E. T-cell receptors are mediators of allergic reactions
6. T-cell receptors or antibodies react with antigens
, A. because both are made by lymphocytes
B. because of complementary of molecular fit of both with antigen
C. because both 'have light chain and heavy chain polypeptides
D. cause histamine release
E. facilitate perforin release
7. All of the following are true of antigen EXCEPT which one of the following?
A. They contain epitopes.
B. They will react with antibodies.
C. They contain antigenic determinants.
D. They can elicit an immune response.
E. They contain paratopes.
8. All of the following are true with respect to IgE molecules, EXCEPT which one?
A. They are the principal immunoglobulin class involved in allergic reactions.
B. They are involved in mediating anti-parasitic immune responses.
C. They will cross the placenta and fix complement.
D. They can effect the release of histamine and other chemical mediators.
E. They are the least abundant immunoglobulin in the serum.
9. Which of the following immunoglobulins is present normally in plasma at the
highest concentration?
A. IgG
B. IgM
C. IgA
D. IgD
E. IgE
10. All of the following are true about antibodies, EXCEPT which one?
A. They fix complement.
B. They occur on the surface of B-lymphocyte
C. They predominate the primary immune response to antigen.
D. They are glycoproteins.
E. They are molecule with a single, defined amino acid sequence.
11. The major immunoglobulin family to which a particular immunoglobulin
belongs can be determined by sequential analysis of the 110 amino acids beginning
from the
A. Amino terminus of the light chain.
B. Carboxy terminus of the light chain.
C. Amino terminus of the heavy chain.
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