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