Multiple choice Which 3 scientists were awarded the Nobel Prize for their discovery of Penicillin? Edward Jenner, Howard Florey, Ernest Chain James Watson, Alexander Fleming, Alfred Hershey Louis Pasteur, Antoine Lavoisier, Ernst Haeckel Alexander Fleming, Howard Florey, Ernest Chain Reveal answer Fill a bubble to check yourself D Correct answer Explanation Alexander Fleming discovered penicillin, while Howard Florey and Ernst Chain were instrumental in developing it into a usable medicine. All three shared the Nobel Prize in 1945.