An illustration showing light dependent reactions in photosynthesis which includes:

1. Photosystem II: It demonstrates how light energy absorbed produces high-energy electrons and water molecules are split to replace those electrons, releasing positive hydrogen ions and oxygen.
2. Electron Transport: demonstrates the movement of High-energy electrons move down the electron transport chain, to photosystem I. Energy generated is used to pump H+ ions across the thylakoid membrane and into the thylakoid space.
3. Photosystem I: Electrons are reenergized in photosystem I. A second electron transport chain then transfers these electrons to nicotinamide adenine dinucleotide phosphate plus, producing nicotinamide adenine dinucleotide phosphate.
4. Hydrogen Ion Movement and Adenosine Triphosphate Formation: As the thylakoid space fills up with positively charged hydrogen ions, the inner thylakoid membrane becomes positively charged relative to the outside of the membrane. Hydrogen ions pass back across the thylakoid membrane through adenosine triphosphate synthase. As the ions pass through, the ATP synthase molecule rotates and the energy produced is used to convert ADP to ATP.

The following are marked on the diagram: Thylakoid Membrane Light Electron carriers Hydrogen ions Adenosine Triphosphate synthase Photosystem I Photosystem II