Question

In a controlled experiment, what is the BEST definition of the function of the positive control?a) It is the substance to be identified.b) It reacts positively and demonstrates the test's ability to detect what you expect.c) It provides a standard for comparison.d) It shows what a negative result will look like.e) Water is always used as positive control in our lab.f) N/A

Answer 1

The positive control is a group that's not exposed to the procedures of the experiment, but it undergoes procedures that will show the expected result. So, the result can be used as a comparison for the results of the other groups.

Therefore, the correct answer is c) It provides a standard for comparison.