5- oxidative phosphorylation Flashcards
information on electron transport chain
• Takes place in the inner mitochondrial membrane.
• A series of electron carriers, each one having increasing affinity for electrons.
• Critical for the generation of ATP through oxidative phosphorylation.
• Oxygen → Acts as a terminal electron acceptor, forming water
oxygen equation in electron transport chain
mitochondrial membranes
• Outer membrane:
- Separates the respiration reactions from the rest of the cell.
- Contains proteins, which allow molecules like pyruvate to pass.
• Inner membrane:
- Large surface area for lots of ETCs and ATP synthase.
- Highly folded to form many cristae.
- Impermeable to H+ ions to maintain the proton gradient.
- Hosts the protein complexes for the ETC.
products from 1 glucose in electron transport chain
• 10x H+ ions (protons) translocated into the intermembrane space.
• 1x water molecule.
process of electron transport chain
- A donor like NADH releases H
atoms at complex I. - The H atom dissociates into an H+ ion and e-.
- The electron begins the electron transport chain.
- It passes along the electron carriers, losing energy as it flows.
- After passing through a series of protein complexes, the electron is accepted by oxygen.
- This energy is used to pump H+ ions from the matrix to the intermembrane space, creating a proton electrochemical gradient.
diagram of electron transport chain
oxidative phosphorylation information
Uses energy released by the electron transport chain to power
ATP synthesis.
products of 1 glucose in oxidative phosphorylation
• 34x ATP.
• 6x water.
• 10x NAD+.
• 10x FAD.
chemiosmosis process
- H+ ions flow through ATP
synthase down their electrochemical gradient by facilitated diffusion back into the matrix from the intermembrane
space. - Energy is released by H+ ions and is used to phosphorylate
ADP into ATP.
