Electron Transport Chain and Oxidative Phosphorylation

These flashcards cover key concepts related to the Electron Transport Chain and oxidative phosphorylation, focusing on the processes involved, electron carriers, and the production of ATP.

What is the primary function of the Electron Transport Chain?

To transfer electrons and pump protons (H+) to create a proton motive force for ATP synthesis.

Which two electron carriers feed into the Electron Transport Chain?

NADH and FADH2.

What does oxidative phosphorylation produce?

ATP, through the process of chemiosmosis.

How many protons are needed to synthesize one ATP molecule?

Four protons.

What are the main complexes involved in the Electron Transport Chain?

Complex I (NADH-CoQ oxidoreductase), Complex II (Succinate-CoQ oxidoreductase), Complex III (CoQ-cytochrome c oxidoreductase), and Complex IV (cytochrome c oxidase).

What is the role of ATP synthase in oxidative phosphorylation?

To synthesize ATP using the proton motive force generated by the Electron Transport Chain.

What tables are referenced for the reduction potentials in the lecture?

Tables from Chapter 14, particularly Table 14-4.

What is the significance of the Q cycle in Complex III?

It involves the transfer of electrons and pumping of protons to facilitate electron flow and create a proton gradient.

In the context of mitochondrial respiration, what is chemiosmosis?

The process by which ATP is produced as protons flow back into the mitochondrial matrix through ATP synthase.

What is the ultimate electron acceptor in the Electron Transport Chain?

Molecular oxygen (O2), which is reduced to water (H2O).