Question

what do alcohol fermentation, acetyl coa formation, and the krebs cycle have in common?
all produce water.
all produce carbon dioxide.
all produce atp.
all produce alcohol.

Explanation:

• Alcohol fermentation: Glucose is broken down. In the process, \(CO_2\) is produced (when pyruvate is converted to acetaldehyde, and then to ethanol).
• Acetyl - CoA formation: Pyruvate (from glycolysis) is converted to acetyl - CoA. One \(CO_2\) molecule is released per pyruvate molecule.
• Krebs cycle (citric acid cycle): Acetyl - CoA enters the cycle. For each acetyl - CoA, two \(CO_2\) molecules are produced.

• Water is not produced in alcohol fermentation. ATP is not produced in acetyl - CoA formation (it is a preparatory step). Alcohol is only produced in alcohol fermentation.

Answer:

All produce carbon dioxide.