In the absence of oxygen, yeast cells can obtain energy by fermentation, which results in the production of which of the following sets of molecules?
A) ATP, CO₂, and ethanol (ethyl alcohol)
B) ATP, CO₂, and lactate
C) ATP, NADH, and ethanol
D) ATP, CO₂, and acetyl CoA

Question

Quizplus · Accepted Answer

Fermentation by yeast cells in the absence of oxygen results in the production of ATP (energy for the cell) and two waste products: carbon dioxide (CO₂) and ethanol. Option B is incorrect because lactate is produced in animal cells during fermentation, not yeast cells. Option C is incorrect because although NADH is produced during fermentation, it is not one of the final products. Option D is incorrect because acetyl CoA is not a product of fermentation, but rather the starting molecule for cellular respiration when oxygen is present.

In the Absence of Oxygen, Yeast Cells Can Obtain Energy