Answer: false
Step-by-step explanation:
During the light reactions of photosynthesis, water is split and the hydrogen ions (H+) produced are used to generate ATP and NADPH, which are then used in the subsequent carbon fixation reactions to combine with CO2 to produce glucose and other organic compounds. The splitting of water during the light reactions is an important step in the overall process of photosynthesis, but the hydrogen ions produced are not directly used to combine with CO2.