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Question: Answered & Verified by Expert
At what percent of alcohol concentration does the yeast poison itself to death?
BiologyRespiration in PlantsNEET
Options:
  • A 7
  • B 9
  • C 11
  • D 13
Solution:
2033 Upvotes Verified Answer
The correct answer is: 13
Yeast undergoes alcoholic fermentation to releases less energy due to anaerobic respiration. It produces ethyl alcohol as a by-product and releases carbon dioxide. At 13% concentration of alcohol yeast starts poisoning itself. This situation does not occur in aerobic respiration because of oxidation reaction.

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