Basics of Biology


How did Louis Pasteur’s theory of fermentation differ from the accepted concept of fermentation?

French chemist and microbiologist Louis Pasteur (1822–1895)—one of the founders of medical microbiology—proposed that fermentation is a process carried out by what he referred to as “living ferments.” Other renowned chemists of the time believed that fermentation was a purely chemical process in which microorganisms were a by-product, not the cause.

Grapes sit in a bin awaiting processing in fermentation vats, where yeast will digest them and turn sugars into alcohol and carbon dioxide.


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