Precipitation occurs when
A) antigen combines with antigen at optimal proportions.
B) antibody combines with antibody at optimal proportions.
C) antibody combines with complement at optimal proportions.
D) antibody combines with antigen at optimal proportions.
E) antigen combines with complement at optimal proportions.

Question

Precipitation occurs when
A) antigen combines with antigen at optimal proportions.
B) antibody combines with antibody at optimal proportions.
C) antibody combines with complement at optimal proportions.
D) antibody combines with antigen at optimal proportions.
E) antigen combines with complement at optimal proportions.

Quizplus · Accepted Answer

Precipitation occurs when antibodies combine with antigens at optimal proportions, causing the formation of immune complexes which become insoluble and precipitate out of solution. This reaction is used in a variety of diagnostic tests, such as the precipitation test for syphilis. Option A, B, C, and E are not correct as they do not explain the process of precipitation.

Precipitation Occurs When