how many ATP are formed during glycolysis?
The pathway of glycolysis can be seen as consisting of 2 separate phases. The first is the chemical priming phase requiring energy in the form of ATP, and the second is considered the energy-yielding phase. In the first phase, 2 equivalents of ATP are used to convert glucose to fructose 1,6-bisphosphate (F1,6BP). In the second phase F1,6BP is degraded to pyruvate, with the production of 4 equivalents of ATP and 2 equivalents of NADH.
Total ATP produced during glycolysis=1 NADH2 =3ATP molecules (In the formation of 1.3-diphosphoglyceric acid +
1 ATP (In forming 3 phosphoglyceric acid) +
1 ATP (In forming Pyruvic acid-last step) ===5 ATP
From 2 pyruvic acid molecules ==10 ATP
Total AtP consumed in this process=1ATP (in forming Glucose-6-phosphate) + 1 ATP (in forming Fructose 1,6 diphosphate) ===2 ATP
Therefore net gain ===10-2=8ATP