What is photosynthesis, include light-dependent reaction and calvin cycle?

Photosynthesis is an anabolic pathway where smaller molecules are used to build larger ones such as glucose. Photons of light hit the plastids of photosystem II which causes a transfer of excited electrons to the reaction center of PS II. A water molecule splits in PSII to replace the electrons of the special chlorophyl that passed its electrons tot he primary electron center. That electron is then passed to an electron transport chain that pumps hydrogen atoms across the membrane which forms a concentration gradient. The electron moves to photosystem I where it replaces the electron lost it its special chlorphyl. The proton concentration gradient created by the electron transport chain is used to generate the formation of ATP at the ATP synthase - a protein that uses the potential energy of a concentration gradient to make ATP. ATP and NADPH is formed in the light dependent reaction which are used as an energy source for the Calvin cycle where G3P is made.