Question

A scientist is studying a form of marine bacteria growing in culture dishes. He noticed that a clear area formed around the mold where the bacteria that had grown in this area died (this is now referred to as a zone of inhibition). In the culture dishes that had no mold, no zones of inhibition were present. Formulate a valid hypothesis based on his observations.

A.) The temperature in the lab was too cold for the mold to grow.
B.) The mold must be producing a chemical that killed the bacteria.
C.) The bacteria must be producing a chemical that killed the mold.
D.) The temperature in the lab was too cold for the bacteria to grow.

Answer 1

The answer would be C
The mold is most likely an antibiotic which produces substances harmful to the strain of bacteria and therefore any bacteria in its zone of inhibition will die as a result

hope that jhelps

Answer 2

Correct answer: B.) The mold must be producing a chemical that killed the bacteria.

Antibiotics is an antimicrobial substance that is used against bacterial infection. They work to inhibit the growth of bacteria either by slowing the growth of bacteria or by killing them. They are not used against viral infections like common cold or flu.

Penicillin was first antibiotics that were discovered by Alexander Fleming while working in the lab with the mold Penicillium notatum