Which item is from the patient in a direct ELISA test?

Question

Quizplus · Accepted Answer

In a direct ELISA test, the antigen from the patient is immobilized on the surface of the assay plate, and this specific antigen is detected by adding a labeled antibody that binds to the antigen. Therefore, the item from the patient in a direct ELISA test is the antigen. B is incorrect because the substrate is added after the antigen-antibody complex has formed, and it is used to detect the labeled antibody. C is incorrect because the antibodies added to the test are not from the patient, but rather they are provided by the laboratory. D is incorrect because antihuman immune serum is not a component of a direct ELISA test.

Which Item Is from the Patient in a Direct ELISA