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 the sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. What is the most likely explination?

The mixture needs less oxygen; yeast only produce alcohol in the absence of oxygen T/F

Question

Biology

Dixie Beltran

18 September, 04:54

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 the sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. What is the most likely explination?

The mixture needs less oxygen; yeast only produce alcohol in the absence of oxygen T/F

+4

Answers (1)

Know the Answer?

Leia · Answer 1

True.

Basically at normal atmospheric concentration of oxygen, the mechanism and processes of fermentation are stopped by the presence of oxygen Yeast does not ferment sugar to produce alcohol in presence of atmospheric oxygen.

Therefore, since these individuals conducted the simple fermentation process in the basement of normal atmospheric concentration of oxygen; the process will not progress due to inhibition of yeast functions by atmospheric oxygen concentration.