Electron donor

Definition

An electron donor is a molecule that donates electrons in a redox (reduction-oxidation) reaction. This process is essential for energy production and various metabolic pathways in microorganisms.

5 Must Know Facts For Your Next Test

1. Electron donors are crucial in cellular respiration and fermentation processes.
2. Common electron donors include NADH, FADH2, and organic molecules like glucose.
3. In microbial metabolism, electron donors can be inorganic substances such as hydrogen sulfide or ammonia.
4. The oxidation of an electron donor releases energy that cells harness for ATP production.
5. Electron donors play a vital role in biogeochemical cycles by influencing the flow of elements like carbon and nitrogen.

Review Questions

Related terms

Redox Reaction: A chemical reaction involving the transfer of electrons between two species.

Electron Acceptor: A molecule that receives electrons during a redox reaction.

ATP (Adenosine Triphosphate):

The primary energy carrier in living organisms, produced mainly through oxidative phosphorylation.