In which of the following testing situations is there a direct relationship between the amount of bound label and the amount of patient antigen present?

Question

Quizplus · Accepted Answer

In a noncompetitive enzyme immunoassay using a second labeled antibody, the amount of bound label directly correlates with the amount of patient antigen present. This is because the labeled secondary antibody binds to the patient antigen, and the more antigen present, the more labeled antibody can bind, leading to a direct relationship between the amount of bound label and the amount of patient antigen. Competitive assays, on the other hand, involve a competition between labeled and unlabeled antigen for binding sites, making the relationship inverse.

In Which of the Following Testing Situations Is There a Direct