Biological Oxidation and Energy Production
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Questions and Answers

What is the primary source of energy for living cells?

  • Electron transport chain
  • Oxidation of proteins
  • Redox chain
  • Oxidation of carbohydrates and lipids (correct)

    • What is the purpose of the redox chain in living cells?

  • To oxidize hydrogen
  • To reduce oxygen to water
  • To liberate energy in small, usable amounts (correct)
  • To generate massive amounts of energy

    • What has the highest electron affinity?

  • Hydrogen
  • Oxygen (correct)
  • Lipids
  • Carbohydrates

    • What is the final common pathway for electron transfer in aerobic cells?

    <p>Respiratory chain (Electron transport chain) (A)</p> Signup and view all the answers

    What is the byproduct of the reaction between hydrogen and oxygen?

    <p>Water and energy (A)</p> Signup and view all the answers

    What is the purpose of the electron transport chain?

    <p>To generate ATP (A)</p> Signup and view all the answers

    What is the role of NADH+ and FADH2 in cellular respiration?

    <p>To give hydrogen and electrons to the electron transport chain (C)</p> Signup and view all the answers

    Why is it necessary to transfer hydrogen in steps through the redox chain?

    <p>To prevent damage to living cells (A)</p> Signup and view all the answers

    What happens to the protons pumped through Complexes I, III, and IV?

    <p>They accumulate in the inter-membrane space, creating a pH gradient (B)</p> Signup and view all the answers

    What is the role of Complex V in the electron transport chain?

    <p>To generate ATP from ADP and Pi (A)</p> Signup and view all the answers

    What is the net result of oxidative phosphorylation from NADH?

    <p>3 ATP are generated (D)</p> Signup and view all the answers

    What is the effect of inhibitors of the electron transport chain?

    <p>They prevent the passage of electrons (D)</p> Signup and view all the answers

    What is the site of action for antimycin A?

    <p>Complex III (B)</p> Signup and view all the answers

    What is the function of F0-F1 channel in ATP synthase?

    <p>To allow protons to enter the ATP synthase (D)</p> Signup and view all the answers

    What is the effect of uncouplers on oxidative phosphorylation?

    <p>They allow oxidation but prevent phosphorylation (A)</p> Signup and view all the answers

    What is the net result of oxidative phosphorylation from FADH2?

    <p>2 ATP are generated (B)</p> Signup and view all the answers

    What is the final acceptor of electrons and protons in the respiratory chain?

    <p>Oxygen (A)</p> Signup and view all the answers

    Which enzyme complex is also known as ATP synthase?

    <p>Complex V (D)</p> Signup and view all the answers

    Which coenzyme is associated with Complex II?

    <p>FAD (B)</p> Signup and view all the answers

    What is formed when electrons combine with oxygen and protons?

    <p>Water (D)</p> Signup and view all the answers

    Which enzyme is found in Complex I?

    <p>NADH dehydrogenase (A)</p> Signup and view all the answers

    Which complex contains cytochrome a + a3?

    <p>Complex IV (C)</p> Signup and view all the answers

    What is the role of cytochrome C oxidase in the electron transport chain?

    <p>Transfer electrons to oxygen (A)</p> Signup and view all the answers

    What is the result of coupling oxidation and phosphorylation in the electron transport chain?

    <p>ATP synthesis (A)</p> Signup and view all the answers

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