During the fermentation of sugar cane molasses in a Trinidad distillery, the temperature was allowed to rise above 40°C. Production of alcohol decreased significantly. Which statement best explains this observation?

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Question

During the fermentation of sugar cane molasses in a Trinidad distillery, the temperature was allowed to rise above 40°C. Production of alcohol decreased significantly. Which statement best explains this observation?

Accepted Answer

Enzymes in the yeast were denatured — Award 1 mark for explaining that high temperatures denature enzymes, preventing fermentation. A is incorrect — rapid multiplication would not decrease alcohol production. C is incorrect — increased oxygen would cause aerobic respiration, not enzyme denaturation. D is incorrect — sugar concentration would not increase due to temperature rise.

Answer

The sugar concentration increased

Answer

More oxygen became available to the yeast

Answer

The yeast cells multiplied too rapidly

Answer

Enzymes in the yeast were denatured

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