ELECTRON CARRIER Definition & Meaning

electron carrier

Any of various molecules that are capable of accepting one or two electrons from one molecule and donating them to another in the process of electron transport . As the electrons are transferred from one electron carrier to another, their energy level decreases, and energy is released. Cytochromes and quinones (such as coenzyme Q) are some examples of electron carriers.

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In cells, it requires several enzymes that send the electrons uphill to an ancient and essential biological electron carrier called ferredoxin.

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Its most important use is as an electron carrier for the process of creating the energy-rich molecule ATP.

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