What critical input is split during photolysis to replace lost electrons in Photosystem II?
Answer
Water
Water molecules are split in a process called photolysis to provide the necessary replacement electrons for the light reactions, simultaneously releasing oxygen as a byproduct.

Related Questions
What fundamental conversion defines the process of photosynthesis?Where does the overall energetic operation of photosynthesis primarily occur within the plant cell?In which specific structure do the light-dependent reactions take place?What is the immediate product of the electron transport chain harnessing energy from electron movement?What is the name of the process that uses the flow of protons down their concentration gradient to create ATP?What two molecules serve as the temporary, short-term energy carriers produced by the light reactions?What critical input is split during photolysis to replace lost electrons in Photosystem II?Where in the chloroplast does the light-independent stage, the Calvin Cycle, take place?Which enzyme catalyzes the initial step of attaching carbon dioxide to RuBP during the Calvin Cycle?How many molecules of ATP are required to synthesize one net molecule of glucose ($ ext{C}_6 ext{H}_{12} ext{O}_6$) via the Calvin Cycle?