Q.

Select the correct statement about ELISA.

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a

It involves the action of certain enzyme.

b

It helps in measuring the antibodies in the body.

c

It is the only diagnostic test available for AIDS.

d

It is based on the principle of antigen-antibody interaction.

answer is C.

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Detailed Solution

Both PCR and ELISA can be used to diagnose AIDS (ELISA is not the only diagnostic test for AIDS).

An enzyme-linked immunosorbent assay (ELISA), is a test that detects and measures antibodies in the blood. It is based on the principle of antigen-antibody interaction. The most commonly used enzymes in this technique are horseradish peroxidase (HRP) and alkaline phosphatase (ALP). 

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