The protons from WATER (H2O ) molecules are used to drive chemiosmosis during photosynthesis.
Photosynthesis is a series of metabolic reactions used by plants to create biomolecules and O2 by using sunlight, H2O and CO2. During this process, a proton gradient is created by chemiosmosis.
The proton gradient is created by pumping protons (H+) across the thylakoid membrane of chloroplasts, thereby generating an electrochemical gradient in a process known as chemiosmosis.
The potential energy of this proton gradient is used by plant cells to synthesize adenosine triphosphate (ATP), the energy coin of the cell.
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