[17] Oxidative Phosphorylation Flashcards
What is Oxidative Phosphorylation?
The process that generates ATP from nutrients through redox reactions.
Where does Oxidative Phosphorylation occur?
In the mitochondria.
What are the two key components of Oxidative Phosphorylation?
- Electron Transport Chain
- ATP synthase
What is the role of NADH and FADH2 in Oxidative Phosphorylation?
They donate electrons to the Electron Transport Chain.
What is the Electron Transport Chain?
A series of proteins in the inner mitochondrial membrane that transfers electrons from NADH and FADH2 to oxygen.
What is ATP synthase?
An enzyme that creates ATP from ADP and inorganic phosphate.
How does the Electron Transport Chain create a proton gradient?
By pumping protons from the mitochondrial matrix to the intermembrane space.
What does the proton gradient do?
Powers ATP synthase to make ATP.
What is the final electron acceptor in the Electron Transport Chain?
Oxygen.
What is chemiosmosis?
The movement of ions across a selectively permeable membrane, down their electrochemical gradient.
What role does chemiosmosis play in Oxidative Phosphorylation?
It drives the phosphorylation of ADP to ATP.
How is water formed in Oxidative Phosphorylation?
By the reduction of oxygen at the end of the Electron Transport Chain.
What role does the inner mitochondrial membrane play in Oxidative Phosphorylation?
It holds the Electron Transport Chain and ATP synthase.
What is the P/O ratio?
The amount of ATP synthesized per oxygen atom reduced (typically around 2.5 for NADH and 1.5 for FADH2).
What is the role of coenzyme Q in Oxidative Phosphorylation?
It transfers electrons within the Electron Transport Chain.
