1. Light or photon strikes the leaf and the thylakoid capture it. As it enter the thylakoid it will first undergo a process in the Photosystem II. It will carry the the 2 atoms of hydrogen splitted from water(H2O)
2. The electron “bounce and bounce” in the pigment, as it hit the Chlorophyll A(P680), this will put the electron to the primary electron acceptor.
3. The photoexcited electron will be transferred by the Primacy Electron Acceptor to the photosystem 1 through the Electron Transport Chain (ETC). The electron will cross the ETC through its three parts; first the plastoquinone, after here to the cytochrome complex, the biggest membrane in ETC, in the CC is the ATP mill. The ATP mill pushes a phosphate to ADP present there becoming ATP as the electron roll over. After here it will pass the plastocyanine and at last to the Photosystem 1.
4. In the photosystem 1; the electron is in its ground-state level to ‘excite’ it, another electron enter through and the Chlorophyll A (P700) will again carry the electron to the primary electron acceptor. In both sides of the PEC here, Ferredoxin is situated. Fd is a protein that carries electron to the NADP+ reductase. In here hydrogen is added to NADP+ resulting in the formation of NADPH+H+.
B. Cyclic Electron Flow
1. Light or photon strikes the leaf and the thylakoid capture it. As it enter the thylakoid it will first undergo a process in the Photosystem II. It will carry the the 2 atoms of hydrogen splitted from water(H2O)
2. The electron “bounce and bounce” in the pigment, as it hit the Chlorophyll A(P680), this will put the electron to the primary electron acceptor.
3. The photoexcited electron will be transferred by the Primacy Electron Acceptor to the photosystem 1 through the Electron Transport Chain (ETC). The electron will cross the ETC through its three parts; first the plastoquinone, after here to the cytochrome complex, the biggest membrane in ETC, in the CC is the ATP mill. The ATP mill pushes a phosphate to ADP present there becoming ATP as the electron roll over. After here it will pass the plastocyanine and at last to the Photosystem 1.
4. The electron will be in the ground-state level in the P700 (Chlorophyll A), and a photon will enter PS1 ‘exciting’ the electron again. After that Chlorophyll A will transfer the electron to the Primary Protein Acceptor, in here Ferredoxin will carry the electron back to the Cytochrome Complex. In there it will again roll over the ATP mill. As it did so, ATP is generated by the addition of phosphate to ADP. And the cycle continues.
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