Medical Quiz

Immunology Quiz


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CD4 cells are also called as

A. NK cells

B. Suppressor T cells

C. Cytotoxic T cells

D. T helper cells


Naive B cells leave bone marrow via blood and can then encounter antigens. If B cell fails to bind an antigen or find Th cell inside a lymph node, what happens?

A. They die

B. Apoptosis

C. They move to next lymph node

D. None of the above


What is a graft between different members of the same species termed?

A. Autograft

B. Allograft  

C. Xenograft  

D. Isograft


Which of the following complement therapeutics targets the classical pathway?

A. PNH

B. aHUS

C. C1-INH

D. C3G


T helper cells contains CD8 and recognize antigen-MHC II molecules

A. TRUE

B. FALSE


To prepare 70 mL of a 10% solution of acetic acid, how much acetic acid is needed?

A. 0.7 mL

B. 7 mL

C. 10 mL

D. 1.4 mL


In the precipitin curve, the zone where there is maximum antibody bound to the least amount of antigen is known as:

A. Ozone

B. Prezone

C. Postzone

D. Zone of Equivalence


Many countries have started to use the __________________ vaccine in order to stop the development of active tuberculosis.

A. Bacillus Calmette-Guérin

B. Flu

C. Varicella

D. MMR


A 3-year-old boy has a history of repeated pyogenic (pus-forming) infections.  He had normal antibody responses following childhood immunizations and normal recovery from chickenpox and measles.  Decreased numbers or functional defects in which of the following cells best explains the cause of his infections? 

A. Eosinophils

B. B lymophocytes

C. T lymphocytes

D. Neutrophils


Which of the following is NOT part of innate immunity?

A. Macrophage

B. Complements

C. Phagocytosis

D. Antibodies


The marker molecules found on the membrane of nucleated cells responsible for graft rejection called

A. HLA

B. Self Ag

C. Non-self Ag

D. All of these


Which of the following is not a site of hematopoiesis?

A. Fetal Liver

B. Yolk sac

C. Bone marrow

D. Thymus


Intracellular virus that infect the whole cell are usually killed by…………….

A. Macrophages

B. T helper cells

C. T cytotoxic cells

D. Neutrophils


A small child suffers from repeated viral infections and has trouble clearing virally infected cells. Which arm of adaptive immunity is likely defective?

A. Complement

B. Cell-mediated immunity

C. Humoral immunity

D. NK-cells


Following are the secondary lymphoid organs, EXCEPT

A. Lymph node

B. Spleen

C. Tonsils

D. Thymus


A small injected dose of a pathogen that stimulates the production of antibodies is:
A. histamine
B. interferon
C. pathogen
D. vaccine


On a TCR, gene recombination occurs

A. in variable region only

B. in variable region and joining region

C. in variable, joining, and constant regions

D. in constant region only


Beta2 microglobulin is part of

A. MHCI

B. MHCII

C. MHCIII

D. All of the above


Which of the following is a characteristic of complement?

A. it is activated by IgE in the classical pathway

B. it cannot be activated by molecules other than antigen-antibody complexes

C. it plays a role in the lysis of target cells coated with specific antibodies

D. it is enhanced by decay-accelerating factor


A serial dilution with the following tubes is set up: 1:2, 1:4, 1:8, 1:16, 1:32, and 1:64. There is no visible agglutination in the 1:64 tube. What is the titer of the antibody?

A. 32

B. 16

C. 64

D. cannot be determined


Which of the following is the most abundant?

A. Basophil

B. Neutrophil

C. Eosinophil

D. Monocyte


It is the simplest method for detection of antigen-antibody reactions.

A. Chemiluminescene Assay

B. Agglutination reaction

C. Electrophoresis

D. Precipitation reaction


This occurs when antigens are found naturally on the surface of a particle, where the antigens will react directly with its corresponding antibody to produce a visible agglomerate.

A. Direct Agglutination

B. Reverse Passive Agglutination

C. Agglutination Inhibition

D. Indirect Agglutination


If a patient reports with positive skin test with no persistent cough, he is having

A. Active tuberculosis

B. Dormant tuberculosis

C. Not conclusive


The following are commonly used chemiluminescent labels except:

A. Acridinium esters

B. Dioxetane Phosphate

C. Isoluminol

D. Agarose gel




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