Which term describes a test for drug availability in a biological model?

Which term describes a test for drug availability in a biological model?

• A. Drug
• B. Diversion
• C. Food and Drug Administration (FDA)
• D. Bioassay

Answer: (D)

A bioassay is a test that uses a living system—such as cells or animals—to measure the activity or amount of a drug in a biological model. Because it ties a dose to a measurable biological response, it directly gauges drug availability in that system. By contrast, a drug is the substance itself, diversion is illicit redistribution, and the FDA is the regulatory body, not a testing method.

A bioassay is a test that uses a living system—such as cells or animals—to measure the activity or amount of a drug in a biological model. Because it ties a dose to a measurable biological response, it directly gauges drug availability in that system. By contrast, a drug is the substance itself, diversion is illicit redistribution, and the FDA is the regulatory body, not a testing method.