5.1.5 - The Electron Transport Chain Flashcards
What is substrate level phosphorylation?
Formation of ATP by transferring phosphate groups from phosphorylated substances directly to ATP.
Where does substrate level phosphorylation occur?
Glycolysis and Krebs cycle
What is oxidative phosphorylation?
Where you make ATP from ADP and Pi in the presence of oxygen.
Occurs in electron transport chain
What are the compounds that the electron transport chain involves?
A series of membrane bound proteins called electron carriers.
What does the energy produced from the transfer of electrons between proteins allow for?
Provides energy for the active transport of protons into the intermembrane space,
What is the term given to oxygen in the electron transport chain?
A terminal electron acceptor
What does the energy formed from protons moving into the matrix through ATP synthase result in?
The synthesis of ATP from ADP
What is the definition of chemiosmosis?
The movement of ions across a semipermeable membrane, down their electrochemical gradient
What happens at protein 1 in the electron transport chain?
NADH is oxidised to form NAD.
Protein 1 accepts 2 electrons
What is the role of oxygen in the electron transport chain?
Combines with protons and electrons to form water.
What happens at protein 2 in the electron transport chain?
FADH2 is oxidised to FAD, releasing 2 electrons.
Why do hydrogen ions move through ATP synthase back into the matrix?
Because a large concentration gradient has been built up.
Describe what happens to oxygen at the end of the electron transport chain.
Acts as terminal electron acceptor and combines with hydrogen ions to form water.
