7.2.3 Oxidative Phosphorylation

• What is oxidative phosphorylation?

  ATP production using ETC energy
• Oxidative phosphorylation uses energy from the electron transport chain to produce ATP
• Oxidative phosphorylation occurs in the mitochondria.
• The electron transport chain generates a proton gradient
• What does oxygen react with during oxidative phosphorylation?

  Electrons and protons
• Oxygen is the final electron acceptor in the electron transport chain.
• The electron transport chain is located in the mitochondrial inner membrane
• Order the key steps of the electron transport chain:

  1️⃣ Electrons are transferred through protein complexes

  2️⃣ Protons are pumped across the membrane

  3️⃣ Oxygen is reduced to water
• Match the ETC component with its role:

  Protein Complexes ↔️ Transfer electrons and pump protons across the membrane

  Oxygen ↔️ Final electron acceptor
• What is the proton gradient used for in oxidative phosphorylation?

  ATP synthesis
• The electron transport chain is essential for ATP synthesis during oxidative phosphorylation.
• Oxygen acts as the final electron acceptor in the electron transport chain, producing water
• What does the proton gradient drive during oxidative phosphorylation?

  ATP synthesis
• The electron transport chain is located in the mitochondrial inner membrane.
• The final electron acceptor in the ETC is oxygen
• What does ATP synthase use as its energy source?

  Proton gradient
• The F₀ component of ATP synthase is embedded in the membrane.
• The F₁ component of ATP synthase is located in the matrix
• What is the role of oxygen in oxidative phosphorylation?

  Final electron acceptor
• Oxidative phosphorylation occurs in the mitochondria.
• What is the electron transport chain's primary role in ATP synthesis?

  Generates proton gradient
• The energy for oxidative phosphorylation comes from the electron
• The mitochondria is the only organelle involved in ATP synthesis.

  False
• Match the key term with its definition:

  Oxidative Phosphorylation ↔️ Process to produce ATP using energy from the electron transport chain

  Electron Transport Chain ↔️ Series of protein complexes transferring electrons to generate a proton gradient

  Mitochondria ↔️ Organelle where oxidative phosphorylation occurs

  ATP ↔️ Main energy currency of cells
• The electron transport chain pumps protons to create a gradient
• What is the role of the proton gradient generated by the ETC?

  Energy source for ATP synthesis
• Match the ATP synthase component with its role:

  F₀ ↔️ Membrane-embedded anchor and proton channel

  F₁ ↔️ Catalytic component of ATP synthesis
• What is the definition of chemiosmosis?

  The movement of ions across a membrane to generate ATP
• ATP synthase utilizes the proton gradient to combine ADP and phosphate into ATP.
• Chemiosmosis is the process where a proton gradient across a membrane drives the synthesis of ATP
• Protons flow through ATP synthase to combine ADP and phosphate, forming ATP.
• Match the term with its definition:

  Chemiosmosis ↔️ Movement of ions to generate ATP

  Proton Gradient ↔️ Difference in proton concentration

  Electron Transport Chain ↔️ Series of proteins pumping protons

  ATP Synthase ↔️ Enzyme complex synthesizing ATP
• Order the steps involved in ATP synthesis via chemiosmosis:

  1️⃣ Electron transport chain pumps protons

  2️⃣ Proton gradient stores potential energy

  3️⃣ Protons flow through ATP synthase

  4️⃣ ATP is produced from ADP and phosphate
• Chemiosmosis is the process by which a proton gradient across the mitochondrial inner membrane is used to produce ATP
• Oxygen combines with electrons and protons to form water
• Oxygen serves as the final electron acceptor in the electron transport chain.
• Oxidative phosphorylation is the process where energy from the electron transport chain is used to produce ATP
• The electron transport chain is located in the mitochondrial inner membrane.
• Order the steps in the electron transport chain process:

  1️⃣ Electrons are transferred through protein complexes

  2️⃣ Protons are pumped across the membrane

  3️⃣ Oxygen accepts electrons and protons

  4️⃣ Water is formed as a byproduct
• ATP synthase synthesizes ATP from ADP and phosphate using the energy from a proton gradient across the mitochondrial inner membrane.gradient