IMMUNOLOGY MOCK TEST WITH EXPLAIN

START TEST & STUDY

1. Pattern recognition receptors (PRR) can be found on?

A) B cells
B) T cells
C) Dendritic cells
D) Defensins

... Answer is C )
Pattern recognition receptors for PAMP occur on host phagocytic cells..

2. Group-specific streptococcal antigens are

A) Carbohydrates
B) Proteins
C) Toxic
D) Enzymatic

... Answer is A )
Group-specific streptococcal antigens are carbohydrates..

3. CD34 is a marker for

A) B cells
B) Th2 cells
C) The gamma delta T-cell receptor
D) Stem cells

... Answer is D )
D. CD34 is a marker for stem cells and permits their isolation...

4. A major marker retained on all peripheral T cells is

A) CD4
B) CD8
C) CD3
D) IL-1

... Answer is C )
. CD3 is retained on all peripheral T cells and serves as a marker for total T-cell enumeration..

5. The T-cell antigenic receptor?

A) ) Is a monomeric IgM molecule
B) Is a monomeric IgG molecule
C) Will respond only to epitopes processed by class I HLA molecules
D) Does not interact directly with circulating antigens

... Answer is D)
The T-cell antigenic receptor requires the antigenic determinant group to be processed and presented together with an HLA molecule and does not respond directly to circulating antigen..

6. . Antibodies are grouped into five classes based on differences in their?

A) ) Kappa chains
B) Lambda chains
C) Heavy chains
D) Light chains

... Answer is C)
. A short sequence of amino acids is shared on the heavy chain of each, thus permitting their classification together as immunoglobulins.

7. Passive immunization is available for protection from?

A) ) ) Influenza A virus
B) Hepatitis A virus
C) Parainfluenza type 2 virus
D) ) Rubella virus

... Answer is B)
. A commercially available human immune globulin preparation is available for pre-exposure and postexposure prophylaxis for hepatitis A virus..

8. The Monospot test is based on?

A) ) ) Destruction of Downey cells
B) Heterophile antibodies
C) Syncytia inhibition
D) Viral capsid antigen antibodies

... Answer is B)
.. IgM antibody produced in response to most Epstein-Barr virus infections agglutinates sheep and beef erythrocytes and forms the basis for the Monospot test used in diagnosing infectious mononucleosis caused by EBV..

9*. The adaptive immune system develops from stem cells originating in the

A) Fetal thymus
B) Fetal liver and bone marrow
C) Placenta
D) Germinal centers of the spleen

... Answer is B)
.. Stem cells that evolve into cells of the adaptive immune system originate in the fetal liver and bone marrow..

10*. The Coombs direct test

A) Detects nonagglutinating anti-Rh antibody on infants red blood cells
B) Detects nonagglutinating anti-Rh antibody in maternal circulation
C) Measures cold agglutinins in primary atypical pneumonia patients
D) Measures serum complement levels

... Answer is A)
.. The Coombs direct test detects nonagglutinating anti-Rh antibody on infants’ red blood cells. The Coombs indirect test detects the anti-Rh antibody on maternal red blood cells...

Thank You