Question

Which of the following is indicative of an effective disinfectant?

A. Reversion mutations occur in the bacterial population.
B. The media shows growth with or near the chemical you're testing.
C. The pH of the media will be altered, thus changing the color of the media.
D. None of the above is correct.

Answer 1

An effective disinfectant is indicated by the media showing growth with or near the chemical being tested.

Step-by-step explanation:

The correct answer choice is B. The media shows growth with or near the chemical you're testing. In the context of disinfectants, an effective disinfectant should inhibit or kill the growth of microorganisms in the surrounding media. In a disk-diffusion assay, if a chemical disinfectant is effective, it will create a large zone of inhibition around the disk where it was applied, indicating that it has successfully killed or inhibited the growth of the test microbe.