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

question 22

Multiple Choice

In a direct ELISA test to screen for drugs in a patient's urine,what is the third step in the test process?

• A)Substrate for the enzyme is added.
• B)Enzyme-labeled antibody against the drug being tested is added.
• C)The patient's urine sample is diluted.
• D)Antibody against the drug being tested is added.

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