The net ATP yield refers to the total number of ATP molecules produced during cellular respiration after accounting for the ATP consumed in the process. In aerobic respiration, the net yield is typically around 30 to 32 ATP molecules per glucose molecule, depending on the efficiency of the electron transport chain and the type of cell. In anaerobic conditions, such as fermentation, the yield is much lower, typically around 2 ATP per glucose molecule. This difference highlights the efficiency of aerobic metabolism compared to anaerobic pathways.
2
In prokaryotes, the breakdown of one molecule of glucose through glycolysis produces a net yield of 2 ATP molecules.
The beta-oxidation of a 12-carbon fatty acid produces 6 acetyl-CoA molecules, which can further enter the citric acid cycle to produce 30 ATP molecules. In addition, 11 NADH + H+ and 11 FADH2 molecules are generated in the beta-oxidation process, contributing to the production of approximately 34 ATP molecules through oxidative phosphorylation. Therefore, the net yield of ATP from catabolizing a 12-carbon fatty acid by beta-oxidation is approximately 64 ATP molecules.
When glucose is metabolized, it yields a net of 30-32 ATP molecules through glycolysis and oxidative phosphorylation. In contrast, glycogen, which is a polymer of glucose, can yield approximately 33-36 ATP molecules due to the fact that its breakdown bypasses one ATP investment step in glycolysis. This difference arises because glycogen is converted to glucose-1-phosphate, which is then converted to glucose-6-phosphate, allowing for a more efficient ATP production. Overall, glycogen metabolism provides a higher ATP yield compared to free glucose.
aerobic(36 ATP)
2 ATP
Correct answer: 2
Glycolysis yields a net of 2 ATP molecules per glucose molecule.
2
Gross yield of ATP during glycolysis: 4Net yield of ATP during glycolysis: 2 (anaerobic glycolysis of a glucose molecule took 2 ATP to accomplish so subtract 2 ATP from your gross yield of 4...therefore it's 2 for net yield).Kreb cycle: produces a total of 2ATP (one each time it happens and it happens twice).
Two net molecules of ATP per fermentation cycle.
During glycolysis it makes a net amount of 2 molecules of ATP. Fermentation happens anaerobically (without oxygen) and the reduction of pyruvate into lactate itself does not yield any ATP. But I think the answer you are looking for is 2 ATP.
In glycolysis, one glucose molecule produces a net yield of two ATP molecules at the end of the process.
The net yield of ATP from one turn of the citric acid cycle is 1 ATP molecule through substrate-level phosphorylation. However, additional ATP can be generated indirectly through the electron transport chain and oxidative phosphorylation using reducing equivalents generated during the citric acid cycle.
2
Glycolysis takes 2 ATP and creates 4 ATP. The net ATP production of Glycolysis is 2ATP.
During glycolysis it makes a net amount of 2 molecules of ATP. Fermentation happens anaerobically (without oxygen) and the reduction of pyruvate into lactate itself does not yield any ATP. But I think the answer you are looking for is 2 ATP.