Non-cyclic photosynthesis is the primary pathway of the light-dependent reactions, producing both ATP and NADPH while releasing Oxygen as a byproduct.
This process involves the linear flow of electrons from Photosystem II to Photosystem I via the Electron Transport Chain (ETC).
The electrons are ultimately transferred to NADP+ to form NADPH, a crucial reducing agent for the Calvin Cycle.
Water molecules serve as the initial electron donor in this process, with their splitting (photolysis) in Photosystem II releasing electrons, protons, and oxygen gas.
Non-cyclic photosynthesis is essential for Carbon Fixation in the Calvin Cycle, as it provides the necessary energy (ATP) and reducing power (NADPH) to synthesize Glucose.
This pathway is a hallmark of oxygenic photosynthesis, occurring in chloroplasts of plants, algae, and cyanobacteria, and plays a central role in the Oxygen Cycle and global energy flow.