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Agglutination and Precipitation

View the animation below, then complete the quiz to test your knowledge of the concept.






1In which of the following cases will the measles virus cause hemagglutination?
A)is added to red blood cells
B)if it is mixed with serum of patient with measles
C)if it is mixed with serum of patient with measles and then red blood cells are added
D)A and B
E)A, B and C



2In the tube agglutination test, the antibody titer is
A)the greatest dilution of serum showing agglutination.
B)the smallest dilution of serum showing agglutination.
C)the reciprocal of the greatest dilution of serum showing agglutination.
D)the reciprocal of the smallest dilution of serum showing agglutination.
E)the sum of all dilutions showing agglutination.



3Precipitation occurs when
A)soluble antigens react with soluble antibodies.
B)soluble antigens react with insoluble antibodies.
C)insoluble antigens react with soluble antibodies.
D)insoluble antigens react with insoluble antibodies.
E)insoluble antigens react with either soluble or insoluble antibodies.



4The equivalence zone is that in which a maximum amount of precipitate is formed.
A)True
B)False



5The amount of precipitate decreases, as the amount of antigen becomes in excess of the antibody.
A)True
B)False







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