A ________ is a group in which a known response is expected.

A ________ is a group in which a known response is expected.

• A. Negative control
• B. Positive control
• C. Experimental group
• D. Baseline

Answer: (B)

A positive control is a group where you apply a treatment that is known to produce a response, which confirms the assay is functioning and provides a benchmark for comparison. This helps ensure that if the experiment doesn’t show an effect in the test groups, the system is still capable of producing a response and that any lack of effect is due to the variable being studied rather than a faulty method. In contrast, a negative control is expected to show no response, an experimental group is used to test the variable of interest, and a baseline provides a reference level before treatment. So, the described group is a positive control.

A positive control is a group where you apply a treatment that is known to produce a response, which confirms the assay is functioning and provides a benchmark for comparison. This helps ensure that if the experiment doesn’t show an effect in the test groups, the system is still capable of producing a response and that any lack of effect is due to the variable being studied rather than a faulty method. In contrast, a negative control is expected to show no response, an experimental group is used to test the variable of interest, and a baseline provides a reference level before treatment. So, the described group is a positive control.