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Multiple Choice
Which of the following does not occur during yeast fermentation?
A
Conversion of glucose to ethanol
B
Production of carbon dioxide
C
Regeneration of NAD+
D
Formation of lactic acid
Verified step by step guidance
1
Understand the process of yeast fermentation: Yeast fermentation is an anaerobic process where glucose is converted into ethanol and carbon dioxide. This process is used in brewing and baking.
Identify the key reactions in yeast fermentation: The main reactions involve the conversion of glucose (C₆H₁₂O₆) into ethanol (C₂H₅OH) and carbon dioxide (CO₂), with the regeneration of NAD+ from NADH.
Recognize the role of NAD+: During glycolysis, NAD+ is reduced to NADH. In fermentation, NADH is oxidized back to NAD+, allowing glycolysis to continue producing ATP.
Differentiate between yeast fermentation and lactic acid fermentation: Yeast fermentation produces ethanol and CO₂, while lactic acid fermentation, which occurs in muscle cells and some bacteria, converts glucose into lactic acid.
Conclude which process does not occur in yeast fermentation: Since lactic acid is not a product of yeast fermentation, the formation of lactic acid does not occur during this process.