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  4. The end product of fermentation are :

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Q. The end product of fermentation are :

Haryana PMTHaryana PMT 2000

Solution:

When oxygen is not available (anaerobic condition) yeast and some other microbes convert pyruvic acid into ethyl alcohol. It is a two step process. In the first step pyruvic acid is decarboxylated to yield acetaldehyde and $CO _{2}$.