How the total 40 ATPs are formed in respiration process by glycolysis,krebs cycle,&electron transport?

Question

How the total 40 ATPs are formed in respiration process by glycolysis,krebs cycle,&electron transport?

Answer 1

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Answer 2

As far as I can remember, In respiration (the presence of O2), cells undergo aerobic glycolysis where the end products are pyruvate +2 ATP + 2 NADH. however, the 2 ATP molecules are compensating those used before in the energy investing phase of glycolysis; thus the net production of ATP from glycolysis is 0. Now each NADH will enter the ETC(electron transport chain) releasing 3 ATP=6 ATP from both. while the Pyruvate will enter the TCA cycle producing 32 ATP.

so the net production of ATP=38 but the total is 40

Hope that helped