alleryPenicillin was discovered by
ALouis Pasteur
BErnest Chain and Howard Florey
CRobert Koch
DAlexander Fleming
Answer & Solution
Correct answer: D. Alexander Fleming
1. syllabus credits the discovery of Penicillin to Alexander Fleming.
2. He observed that a mould inhibited Staphylococci growth in a culture plate.
3. He named the antibiotic after the mould Penicillium notatum.
4. Chain and Florey developed it as an effective drug; all three shared the Nobel Prize in 1945.
_Source: syllabus Biology, Ch 8 "Microbes in Human Welfare", §8.2.2_
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