If the addition of an antibody raised against bacteria B, to a cell suspension mixture of...

If the addition of an antibody raised against bacteria B, to a cell suspension mixture of Bacteria A+B+C causes the formation of precipitants, that indicates:

Select one:

a. Bacteria B is present in the cell suspension mixture.

b. Bacteria A is absent in the cell suspension mixture.

c. Bacteria B is absent in the cell suspension mixture.

d. Bacteria A and B and C are present in the cell suspension mixture.

e. Bacteria A is present in the cell suspension mixture.

Expert Solution

Answere : The correct option is Option (a) i.e. Bacteria B is present in the cell suspension mixture.

Explanation : Anibody-Antigen interaction is a specific immunological reaction. A primary immunological reaction involves the specific recognition and combination of the binding site of the antibody with its corresponding antigenic determinant of the antigen of pathogen like bacteria.

Antibodies bind with an antigen through four basic mechanism : Neutralization, agglutination, precipitation, and complex fixation. Precipitation is a reaction of soluble antigens with soluble antibodies to create an insoluble substance.

This ability is used in various immunological test.

When a specific antibody against particular bacteria is added in cell suspension containing respective bacteria, this result in precipitation.

So, If the addition of an antibody raised against bacteria B, to a cell suspension mixture of Bacteria A+B+C causes the formation of precipitants, that indicates bacteria B is present in the cell suspension mixture.

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gladiator answered 2 years ago

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