Question

1.2.2 which antibiotic is the best choice? - conclusion questions complete: __ correct: on time: total score: __/4 1. why is the clear area surrounding an antibiotic disk called the zone of inhibition? 2. what was the purpose of the control disk?

Explanation:

1. The clear area around an antibiotic disk is called the zone of inhibition because the antibiotic in the disk diffuses into the surrounding medium and inhibits the growth of bacteria in that area, creating a clear region where there is no bacterial growth.
2. The purpose of the control disk is to serve as a baseline or reference. It usually contains no antibiotic or a substance that should have no effect on bacterial growth. This allows researchers to compare the results of the antibiotic - containing disks against it, to determine if any observed effects are due to the antibiotics and not some other factor in the experimental setup.

Answer:

1. Because the antibiotic inhibits bacterial growth in that area, creating a clear region.
2. To serve as a baseline or reference for comparison.