Transpor elektron

Transpor elektron berlangsung pada krista membran dalam dalam mitokondria. Retrieved from " https: The electron transport chain consists of a spatially separated series of redox reactions in which electrons are transferred from a donor molecule to an acceptor molecule. This entire process is called oxidative phosphorylation , since ADP is phosphorylated to ATP using the energy of hydrogen oxidation in many steps.

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TRANSFER ELEKTRON by Malkann Yahya A on Prezi

Complex I is one transporr the main sites at which premature electron leakage to oxygen occurs, thus being one of the main sites of production of superoxide. In eukaryotes, NADH is the most important electron donor. Please log in to add your comment. In photophosphorylationthe energy of sunlight is used to create a high-energy electron donor and an electron acceptor. A firewall is blocking access to Prezi content.

Do you really want to delete this prezi? Creating downloadable prezi, be patient. Selain itu, molekul lain yang juga berperan adalah molekul oksigen, koenzim Q Ubiquinonesitokrom b, sitokrom c, dan sitokrom a. Oksidasi yang terakhir ini lagi-lagi tranapor energi yang cukup besar untuk dapat menyatukan ADP dan gugus fosfat organik menjadi ATP.

Just as there are a number of different electron transppr organic matter in organotrophs, inorganic matter in lithotrophsthere are a number of different electron acceptors, both organic and inorganic.

Sitokrom a ini kemudian akan dioksidasi oleh sebuah atom oksigen, yang merupakan zat yang paling elektro negatif dalam rantai tersebut, dan merupakan akseptor terakhir elektron. Some dehydrogenases are proton pumps; others are not. Bacteria select their electron transport chains from elekron DNA library containing multiple possible dehydrogenases, terminal oxidases and terminal reductases.

Send the link below via email or IM. The associated electron transport chain is.

Transfer Elektron by hannah mounntain on Prezi

Under aerobic conditions, it uses two different terminal quinol oxidases both proton pumps to reduce oxygen to water. The same effect can be produced by moving electrons in the opposite direction. Reset share links Resets both viewing and editing links coeditors shown below are not affected.

Steroid metabolism Sphingolipid metabolism Eicosanoid metabolism Ketosis Reverse cholesterol transport. Electron transport chains are redox reactions that transfer electrons from an electron donor to an electron acceptor. Individual bacteria use multiple electron transport chains, often simultaneously.

During this process, four protons are translocated from the mitochondrial matrix to the intermembrane transpkr. A small percentage of electrons do not complete the whole series and instead directly leak to oxygen, resulting in the formation of the free-radical superoxidea highly reactive molecule that contributes to oxidative stress and has been implicated in a number of diseases and aging.

Electrons may enter an electron transport chain at the level of a mobile cytochrome or quinone carrier.

The efflux of protons from the mitochondrial matrix creates an electrochemical gradient proton gradient. This page was last edited on 16 Octoberat Do you really want to delete this prezi?

Send this link to let others join your presentation: The transfer of electrons eletkron coupled to the translocation of protons across a membrane, producing a proton gradient. In most organisms the majority of ATP is generated in electron transport chains, while only some obtain ATP by fermentation.

Electron transport chain

Quinones are mobile, lipid-soluble carriers that shuttle electrons and protons between large, relatively immobile macromolecular complexes embedded in the membrane. However, in specific cases, uncoupling the two processes may be biologically useful. Elekfron electrons are removed from QH 2 at the Q O site and sequentially transferred to elekgron molecules of cytochrome ca water-soluble electron carrier located within the intermembrane space. They also function as electron carriers, but in a very different, intramolecular, solid-state environment.

They are found in two very different environments.

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