Electron Transport Chain Quiz
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Questions and Answers

Which molecule accepts electrons from both Complex I and Complex II in the electron transport chain?

  • cytochrome c
  • succinate
  • FAD
  • CoQ (correct)

    • Which complex in the electron transport chain is a dimer of two identical complexes, each made of 11 or more different subunits?

  • Complex V
  • Complex II
  • Complex IV
  • Complex III (correct)

    • Which molecule transfers electrons one at a time to the Fe-S centers in Complex II of the electron transport chain?

  • NADH
  • FADH2 (correct)
  • succinate
  • cytochrome c1

    • Which subunit within Complex III of the electron transport chain reduces cytochrome c?

    <p>cytochrome c1</p> Signup and view all the answers

    Which molecule donates electrons to Complex III in the electron transport chain?

    <p>CoQH2</p> Signup and view all the answers

    Which molecule takes 2 electrons from succinate in the TCA cycle in Complex II of the electron transport chain?

    <p>FAD</p> Signup and view all the answers

    Which complex in the electron transport chain contains cytochrome b with two hemes and the Rieske iron sulfur center as its functional core?

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

    Which molecule is the mobile carrier that receives electrons from the Fe-S centers in Complex II and cytochrome b in Complex III of the electron transport chain?

    <p>CoQ</p> Signup and view all the answers

    Which complex in the electron transport chain accepts electrons from CoQH2 that is reduced by accepting electrons from Complexes I and II?

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

    Which molecule delivers electrons to Complex IV in the electron transport chain?

    <p>cytochrome c</p> Signup and view all the answers

    Which subunit within Complex III of the electron transport chain contains a prosthetic group that accepts electrons from CoQH2?

    <p>Rieske iron sulfur center</p> Signup and view all the answers

    Which molecule delivers 2 electrons to Complex II in the electron transport chain?

    <p>succinate</p> Signup and view all the answers

    Which molecule accepts electrons from both Complex I and Complex II in the electron transport chain?

    <p>CoQ</p> Signup and view all the answers

    Which complex in the electron transport chain is a dimer of two identical complexes, each made of 11 or more different subunits?

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

    Which molecule transfers electrons one at a time to the Fe-S centers in Complex II of the electron transport chain?

    <p>FADH2</p> Signup and view all the answers

    Which subunit within Complex III of the electron transport chain reduces cytochrome c?

    <p>cytochrome c1</p> Signup and view all the answers

    Which molecule donates electrons to Complex III in the electron transport chain?

    <p>CoQH2</p> Signup and view all the answers

    Which molecule takes 2 electrons from succinate in the TCA cycle in Complex II of the electron transport chain?

    <p>FAD</p> Signup and view all the answers

    Which complex in the electron transport chain contains cytochrome b with two hemes and the Rieske iron sulfur center as its functional core?

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

    Which molecule is the mobile carrier that receives electrons from the Fe-S centers in Complex II and cytochrome b in Complex III of the electron transport chain?

    <p>CoQ</p> Signup and view all the answers

    Which complex in the electron transport chain accepts electrons from CoQH2 that is reduced by accepting electrons from Complexes I and II?

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

    Which molecule delivers electrons to Complex IV in the electron transport chain?

    <p>cytochrome c</p> Signup and view all the answers

    Which subunit within Complex III of the electron transport chain contains a prosthetic group that accepts electrons from CoQH2?

    <p>Rieske iron sulfur center</p> Signup and view all the answers

    Which molecule delivers 2 electrons to Complex II in the electron transport chain?

    <p>succinate</p> Signup and view all the answers

    What is the function of FADH2 in Complex 2?

    <p>Takes electrons from succinate</p> Signup and view all the answers

    What is the role of Fe-S centers in Complex 2?

    <p>Delivers electrons to CoQ</p> Signup and view all the answers

    Which subunit forms the functional core of Complex III?

    <p>Cytochrome c1</p> Signup and view all the answers

    What is the prosthetic group within Complex III that reduces cytochrome c?

    <p>Cytochrome c1</p> Signup and view all the answers

    What is the electron donor to Complex IV?

    <p>Cytochrome c1</p> Signup and view all the answers

    How many subunits make up each identical complex in Complex III?

    <p>more than 11</p> Signup and view all the answers

    What is the mobile carrier in Complex III?

    <p>Coenzyme Q</p> Signup and view all the answers

    What delivers the electrons one at a time to the wire in Complex 2?

    <p>FADH2</p> Signup and view all the answers

    What is the name of the enzyme in Complex III?

    <p>Cytochrome c Reductase</p> Signup and view all the answers

    What is reduced by accepting electrons from Complexes I & II in Complex III?

    <p>CoQ</p> Signup and view all the answers

    What is the name of the electron donor to Complex III?

    <p>Coenzyme QH2</p> Signup and view all the answers

    What is the name of the electron acceptor in Complex IV?

    <p>Oxygen</p> Signup and view all the answers

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