Photosynthesis Aerobic respiration Chloroplast Mitochondrion CO2+ H2O CO2+H2O Carbohydrate ATP (contains high energy electrons) NADPH ■■■■■ NADH ADP NADP+ NAD chemical energy (ATP) H20 (contains low energy electrons H20 e . e Figure 6.4 An overview of the energetics of photosynthesis and aerobic respiration.227