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Ethanol is commercially produced through a particular species of:

1. Saccharomyces
2. Clostridium
3. Trichoderma
4. Aspergillus

Correct answer: Saccharomyces

Solution

Saccharomyces, especially S. cerevisiae, is the classic yeast used to ferment sugars into ethanol on an industrial scale. The other options are better known for different fermentation products or enzyme production.

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