Explanation

Net gain of ATP during aerobic respiration 1.Glycolysis provides 2ATP molecules and 2NADH+$H^{+}$ 2.Pyruvate oxidation yields 2NADH + $H^{+}$ 3.Krebs’ cycle produces 2GTP molecules, 6NADH + $H^{+}$ and 2FAD$H_{2}$ molecules. 4.In electron transport system one NADH + $H^{+}$ produce 3ATP and FADH₂ produces 32 or 34 ATP. 2ATP from glycolysis + 2GTP from TCA cycle and 32/34 ATP from ETS/ETC =38/36 ATP molecule.