Question

What is the net ATP that is synthesized when one molecule of glucose is fermented to alcohol or lactic acid?

Answer 1

Fermentation:

1. It is an anaerobic chemical reaction that breaks down molecules like glucose.
2. Enzymes in yeast carry out the fermentation process, converting glucose into ethanol.

Net ATP production when one molecule of glucose is fermented to alcohol or lactic acid:

1. When glucose ferments, there is a net gain of two ATP molecules in the glycolysis process.
2. Both lactic acid and alcoholic fermentation proceed in the same way.
3. When a glucose molecule is partly oxidised to make two molecules of pyruvate, glycolysis produces four molecules of ATP.
4. Because two ATPs are used in the first stages of glycolysis, there is a net gain of two ATP molecules.