When slowly adding antigen to an antiserum, the amount of precipitin would gradually increase until reaching the ..... ; addition of more antigen after this point would actually decrease the amount of precipitin.

VACCINATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

When slowly adding antigen to an antiserum, the amount of precipitin would gradually increase until reaching the ____ ; addition of more antigen after this point would actually decrease the amount of precipitin.

A	zone of equivalence
B	zone of antigen excess
C	zone of antibody excess
D	none of these

Explanation:

Detailed explanation-1: -Precipitation reaction Soluble antigens combine with soluble antibodies in presence of an electrolyte at suitable temperature and pH to form insoluble visible complex. This is called a precipitation reaction. It is used for qualitative and quantitative determination of both antigen and antibody.

Detailed explanation-2: -What would cause two or more precipitin bands to form in an antigen-antibody experiment? Non-identity with two antigens behaving independently.

Detailed explanation-3: -Precipitin Reactions. A visible antigen-antibody complex is called a precipitin, and in vitro assays that produce a precipitin are called precipitin reactions. A precipitin reaction typically involves adding soluble antigens to a test tube containing a solution of antibodies.

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IMMUNOLOGY

MISCELLENOUS

VACCINATION