In a direct ELISA test to screen for drugs in a patientʹs urine, what is the third step in the test process?
A) enzyme-labeled antibodies against the drug being tested is added
B) substrate for the enzyme is added
C) antibody against the drug being tested is added
D) the patientʹs urine sample is diluted

Question

Quizplus · Accepted Answer

In a direct ELISA, the third step involves adding enzyme-labeled antibodies that will bind to the drug or antigen present in the sample.

In a Direct ELISA Test to Screen for Drugs in a Patientʹs