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

Question

Quizplus · Accepted Answer

The third step in a direct ELISA test to screen for drugs in a patient's urine is the addition of enzyme-labeled antibodies against the drug being tested. This step allows for the detection and quantification of the drug in the patient's urine sample. The enzyme label on the antibody will catalyze a reaction with the substrate added in the next step, producing a detectable signal indicating the presence of the drug.

In a Direct ELISA Test to Screen for Drugs in a Patient's