where does the energy come from to drive the proton pump

WHERE DOES THE ENERGY COME FROM TO DRIVE THE PROTON PUMP PLUS

The 2 are shown with an arrow moving into the protein channel and being transferred to the Pheophytin, primary acceptor.

WHERE DOES THE ENERGY COME FROM TO DRIVE THE PROTON PUMP PLUS

Inside the thylakoid lumen of the Photosystem II diagram there is a formula that shows H2O producing ½ O2 plus 2 hydrogen ions and releasing 2 electrons. The Photosystem II image shows a lightning bolt labeled light hitting the protein channel and there are arrows from the lightning bolt pointing to the dots labeled P680 special pair.

In the photosystem II image, there is a structure labeled Pheophytin, primary acceptor and on the bottom of the channel there are 2 circles labeled P680 special pair. The outside of the membrane is labeled Stroma, and the inside of the membrane is labeled thylakoid lumen. Both images have a diagram of a phospholipid bilayer with a protein channel within the membrane. There is an arrow pointing from the image on the left to the image on the right with the label electron transport chain. Two images the image on the left is titled Photosystem II, the image on the right is titled Photosystem I. Water is split on the thylakoid lumen side of the thylakoid membrane, so the protons are released inside the thylakoid, contributing to the formation of a gradient.

H 2 O → 1 2 O 2 + 2 H + ext H_2 ext O ightarrow rac ext O_2 + 2 ext H^+ H 2 O → 2 1 O 2 + 2 H + start text, H, end text, start subscript, 2, end subscript, start text, O, end text, right arrow, start fraction, 1, divided by, 2, end fraction, start text, O, end text, start subscript, 2, end subscript, plus, 2, start text, H, end text, start superscript, plus, end superscript. The basic equation for water splitting can be written as This splitting of water releases the O 2 ext O_2 O 2 start text, O, end text, start subscript, 2, end subscript we breathe. The high-energy electron is passed to an acceptor molecule and replaced with an electron from water. There, energy is transferred to P680, boosting an electron to a high energy level (forming P680*). When light is absorbed by one of the pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center.

Where does the energy come from to drive the proton pump