Multiple choice

Who discovered penicillin, the first antibiotic used to treat diseases?

  1. Gregor Mendel

  2. Alexander Fleming

  3. Joseph Lister

  4. Ronald Ross
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alexander Fleming discovered penicillin in 1928 when he noticed mold (Penicillium notatum) killing bacteria in a petri dish. This was the first antibiotic used to treat diseases, revolutionizing medicine. Mendel discovered genetics, Lister pioneered antiseptic surgery, and Ross identified malaria transmission via mosquitoes.

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