What is the temperature range for yeast to convert sugar to alcohol?

What is the temperature range for yeast to convert sugar to alcohol?

• A. 50F - 113F
• B. 32F - 50F
• C. 86F - 120F
• D. 60F - 90F

Answer: (A)

Yeast can work across a wide temperature window, and different strains tolerate different ends of that spectrum. The range from about 50°F up to 113°F covers the broadest practical tolerance, from slower, cooler fermentations to hotter ones where yeast remain active before stress or death sets in. Warmer temperatures speed fermentation but can bring off-flavors, while cooler temperatures slow it markedly. The other options miss either the lower end, the upper end, or both, whereas this broad range reflects how yeast behave across common fermentation scenarios.

Yeast can work across a wide temperature window, and different strains tolerate different ends of that spectrum. The range from about 50°F up to 113°F covers the broadest practical tolerance, from slower, cooler fermentations to hotter ones where yeast remain active before stress or death sets in. Warmer temperatures speed fermentation but can bring off-flavors, while cooler temperatures slow it markedly. The other options miss either the lower end, the upper end, or both, whereas this broad range reflects how yeast behave across common fermentation scenarios.