Multiple choice

Penicillin, an antibiotic that reduced death rates, was discovered where by A. Fleming in 1928?

  1. the mold inside a Petri dish

  2. bacteria found on a microscope

  3. inside a water molecule

  4. the bottom of Fleming's shoe
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alexander Fleming discovered penicillin when he noticed that a mold, Penicillium notatum, had contaminated a Petri dish and was inhibiting the growth of staphylococci bacteria.

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