Final answer:
The Bethesda titer assay is used to measure the strength of an inhibitor, such as antibodies, that can interfere with a specific biological process.
Step-by-step explanation:
The Bethesda titer assay is used when it is necessary to measure the strength of an inhibitor. This assay is commonly used in the field of immunology to determine the presence and quantitate the activity of inhibitors, such as antibodies, that can interfere with a specific biological process.
By measuring the titer of the inhibitor, researchers and clinicians can assess the effectiveness of treatment or diagnose certain conditions.