Electron transfer

Definition

Electron transfer is the movement of electrons from one molecule or atom to another. It plays a crucial role in many biological processes, including cellular respiration and photosynthesis.

5 Must Know Facts For Your Next Test

1. Electron transfer can result in the formation of ions, where atoms gain or lose electrons.
2. Redox reactions involve electron transfer; oxidation is the loss of electrons while reduction is the gain of electrons.
3. Electron transport chains in mitochondria are essential for ATP production during cellular respiration.
4. Photosystems in chloroplasts use electron transfer to convert light energy into chemical energy during photosynthesis.
5. Metal ions, like iron and copper, often facilitate electron transfer in biological systems.

Review Questions

• What happens to an atom when it undergoes oxidation?
• How is electron transfer involved in ATP production?
• What role do metal ions play in biological electron transfers?

Related terms

Ion: An atom or molecule that has lost or gained one or more electrons, resulting in a net electric charge

Redox Reaction: A chemical reaction involving the transfer of electrons between two species; includes both reduction and oxidation processes

ATP (Adenosine Triphosphate): The primary energy carrier in cells that stores and supplies energy necessary for many biochemical processes