Microbial Metabolism - Electron Donors and Acceptors

6 important questions on Microbial Metabolism - Electron Donors and Acceptors

What is a half reaction?

A term that implies the need for a second half reaction to complete the overall redox reaction

What is an electron acceptor?

The substance reduced in a redox reaction

What is the reduction potential?

The tendency of substances to donate or accept electrons
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When two redox couples react, which couple donates electrons and which one accepts electrons?

The reduced substance of the couple with the more negative reduction potentials donates electrons to the oxidized substance of the couple with the more positive reduction potential.

Is the most negative reduction potential on the top of the bottom of a redox tower?

On the top

Are redox couples in the middle of the redox tower electron donors or acceptors?

Depending on whom they react with they can be either electron donors or acceptors

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