Essential Chemistry for IGCSE - Biological Molecules (Section 1 - No. 19)
What is the effect of a high concentration of ethanol on yeast in fermentation?
It speeds up the fermentation process.
It inhibits the fermentation process.
It has no effect on the fermentation process.
It provides nutrients for the yeast.
Explanation
High ethanol concentrations are toxic to yeast, eventually stopping fermentation.
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