It takes 2 ATP molecules to start the process. Even though it makes 4 there is only a GAIN of 2. For example if you spend two dollars, you have 0. then if you make two more you have four dollars, but did not make a profit only balanced out your amount. Kind of in glycolysis
Glycolysis yields a net of 2 ATP molecules per glucose molecule.
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.
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).
In glycolysis, two molecules of ATP are used in the initial steps, specifically during the phosphorylation of glucose and its conversion to fructose-1,6-bisphosphate. Subsequently, four molecules of ATP are produced during the later stages of glycolysis, resulting in a net gain of two ATP molecules. Thus, glycolysis is an energy-yielding process despite its initial investment of ATP.
2 ATP
2
Glycolysis takes 2 ATP and creates 4 ATP. The net ATP production of Glycolysis is 2ATP.
In glycolysis, one glucose molecule produces a net yield of two ATP molecules at the end of the process.
36 ATP molecules can be produced by 1 molecule of glucose. These 36 ATP molecules will complete cellular respiration.
Two molecules are used to start glycolysis, and two are used to move NADH made during glycolysis into the mitochondria.
2Actually it produces four. But two are used in the mechanism
Glycolysis forms a net profit of two ATP molecules. Two ATPs are required to begin this process, and the product is four ATP molecules.