Precipitation tests involve all of the following, except
A)they rely on formation of visible clumps for detection.
B)they include the VDRL test for syphilis.
C)they are often performed in agar gels.
D)they can be done in a test tube by carefully adding antiserum over antigen solution.
E)a cloudy or opaque zone developing where antigen and antibody react.

Question

Quizplus · Accepted Answer

Precipitation tests do not rely on the formation of visible clumps for detection; that is characteristic of agglutination tests. Precipitation tests involve the formation of a cloudy or opaque zone where antigen and antibody react.

Precipitation Tests Involve All of the Following, Except