Some friends are trying to make wine in their basement. They've added yeast to a sweet grape juice mixture and have allowed the yeast to grow. After several days, they find that sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. The most likely explanation is that ________.

Question

Quizplus · Accepted Answer

Yeast produce alcohol through fermentation, which occurs in the absence of oxygen. If there is too much oxygen, yeast will undergo aerobic respiration instead, which does not produce alcohol.

Some Friends Are Trying to Make Wine in Their Basement