electron transfer
Quick Summary
Electron transfer is a fundamental process in chemistry, often referred to as oxidation-reduction or redox reactions. These reactions involve the movement of electrons from one chemical species to another. In an oxidation process, a substance loses electrons, while in a reduction process, it gains electrons. These two processes are coupled and occur simultaneously.12
For example, when zinc metal reacts with copper(II) ions in water, the zinc loses electrons (is oxidized) and becomes a zinc ion, while the copper(II) ions gain electrons (are reduced) and become copper metal. The net change is the transfer of electrons from zinc to copper.1
Electron transfer is crucial in various chemical and biological systems, including electrochemical reactions and metabolism. In biological systems, electron transfer carriers in the respiratory chain facilitate the transfer of electrons, ultimately leading to energy production.34
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cellThe electron-transport chain…in the waterfall of the electron flow and the site at which energy from the overall redox reaction is tapped. The first complex, NADH dehydrogenase, accepts a pair of electrons from the primary electron donor NADH and is reduced in the process. It in turn donates these electrons to the…
Read More…in the waterfall of the electron flow and the site at which energy from the overall redox reaction is tapped. The first complex, NADH dehydrogenase, accepts a pair of electrons from the primary electron donor NADH and is reduced in the process. It in turn donates these electrons to the…
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metabolismThe nature of the respiratory chainFour types of hydrogen or electron carriers are known to participate in the respiratory chain, in which they serve to transfer two reducing equivalents (2H) from reduced substrate (AH2) to molecular oxygen (reaction [49]); the products are the oxidized substrate (A) and water (H2O).
Read MoreFour types of hydrogen or electron carriers are known to participate in the respiratory chain, in which they serve to transfer two reducing equivalents (2H) from reduced substrate (AH2) to molecular oxygen (reaction [49]); the products are the oxidized substrate (A) and water (H2O).
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photosynthesisProteinsDuring electron transfer, an electron is accepted by an iron atom in the pigment portion of a cytochrome molecule, which thus is reduced; then the electron is transferred to the iron atom in the next cytochrome carrier in the electron transfer chain, thus oxidizing the first…
Read MoreDuring electron transfer, an electron is accepted by an iron atom in the pigment portion of a cytochrome molecule, which thus is reduced; then the electron is transferred to the iron atom in the next cytochrome carrier in the electron transfer chain, thus oxidizing the first…
Read More- photosynthesisStep two: The conversion of light energy to ATP
…channel that permits protons to flow through the lamellar membrane to F1. The enzymes in F1 then catalyze ATP formation, using both the proton supply and the lamellar transmembrane charge.
Read More…channel that permits protons to flow through the lamellar membrane to F1. The enzymes in F1 then catalyze ATP formation, using both the proton supply and the lamellar transmembrane charge.
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