Question 1

Precipitation reactions involve combination of soluble antibody with:

Accepted Answer

A)  soluble antigen 
B)  cellular antigens 
C)  red blood cells 
D)  radioactive antigen

Question 2

An example of a qualitative precipitation procedure is:

Accepted Answer

A)  Ouchterlony 
B)  radial immunodiffusion 
C)  rapid plasma reagin 
D)  complement fixation

Question 3

Affinity between individual antigen and antibody molecules depends on several types of bonds,such as ionic bonds,hydrophobic bonds,hydrogen bonds,and van der Waals forces.How is the strength of these attractions characterized?

Accepted Answer

A)  specificity 
B)  avidity 
C)  reactivity 
D)  multivalency

Question 4

Which of the following would be considered a single diffusion reaction?

Accepted Answer

A)  RID 
B)  immunoelectrophoresis 
C)  Ouchterlony diffusion 
D)  immunofixation electrophoresis

Question 5

An Ouchterlony immunodiffusion assay is set up and a line of precipitation is seen forming between the antigen and antibody wells.The lines of precipitation formed by two adjacent antigen wells cross each other,forming an X.The reaction described is called:

Accepted Answer

A)  identity 
B)  non-identity 
C)  partial identity

Question 6

Your supervisor wants you to design a quantitative precipitation assay for a new diagnostic test.Which of the following methods would you adopt?

Accepted Answer

A)  Ouchterlony immunodiffusion 
B)  serum protein electrophoresis 
C)  radial immunodiffusion 
D)  enzyme immunoassay

Exam 8: Precipitation Reactions