Answer:
see explaination
Explanation:
1. A metabolic pathway that OXIDIZES an energy-rich source to produce ATP from ADP.
Oxidation reactions are exergonic and can be coupled to produce ATP from ADP + Pi
2. Electrons are transferred from electron DONORS to compounds with a STRONGER reduction potential.
Electrons are moved from compounds with low reduction potential to compounds with high reduction potential.
3. As electrons move through the electron transport chain, ETC, the energy in the electron is used to pump PROTONS across a membrane.
In respiration, protons are pumped from the mitochondrial matrix to the perimitochondrial space.
4. The pumping of these molecules against their concentration gradient is a form of FACILITATED transport.
Since protons are charged particles, they require a carrier protein for their transport. The movement of these molecules back into the cell (down their concentration gradient) releases energy which the cell couples to the formation of ATP.
6. The energy in PHOTON/LIGHT is absorbed by an electron in a photocenter. This energy is converted from light energy into chemical energy into kinetic energy as the energized electron is used in back to back REDOX reaction in the electron transport chain, ETC.
7. The ETC creates A PROTON GRADIENT which is used by the cell to power the formation of ATP.
8. In CYCLIC ELECTRON TRANSPORT, the electron returns to the photocenter.
9. In NON-CYCLIC photosynthesis the electron reduces NADP+ to form NADPH.
