Master the Complex III Electron Transport Chain
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Questions and Answers

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

  • CoQH2 (correct)
  • Fe-S centers
  • Cyt b
  • Cyt c1

    • What happens to the electron that is sent through Fe-S centers in complex III?

  • It is lost in the process
  • It is dropped to Cyt c1 (correct)
  • It is sent to Cyt b
  • It is recycled by CoQ

    • Which molecule receives an electron from Cyt b in complex III?

  • Fe-S centers
  • Cyt c1
  • Cyt c
  • CoQ (correct)

    • What is the prosthetic group of cytochromes?

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

    How many nitrogen atoms are bonded to the iron atom in the porphyrin ring of heme?

    <p>4</p> Signup and view all the answers

    What happens to the electron that is sent through Cyt b in complex III?

    <p>It is dropped to CoQ</p> Signup and view all the answers

    What is the function of Cyt c in the electron transport chain?

    <p>To transfer electrons between complexes</p> Signup and view all the answers

    How many electrons are taken from CoQH2 in complex III?

    <p>2</p> Signup and view all the answers

    What is the role of Fe-S centers in complex III?

    <p>To transfer electrons</p> Signup and view all the answers

    What happens to the electron that is sent through Cyt c1 in complex III?

    <p>It is dropped to Cyt c</p> Signup and view all the answers

    What happens to CoQ after it gains two electrons in complex III?

    <p>It is recycled</p> Signup and view all the answers

    What is the function of Cyt b in the electron transport chain?

    <p>To transfer electrons</p> Signup and view all the answers

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

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

    What happens to the electron that is sent through Fe-S centers in complex III?

    <p>It is dropped to Cyt c1</p> Signup and view all the answers

    Which molecule receives an electron from Cyt b in complex III?

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

    What is the prosthetic group of cytochromes?

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

    How many nitrogen atoms are bonded to the iron atom in the porphyrin ring of heme?

    <p>4</p> Signup and view all the answers

    What happens to the electron that is sent through Cyt b in complex III?

    <p>It is dropped to CoQ</p> Signup and view all the answers

    What is the function of Cyt c in the electron transport chain?

    <p>To transfer electrons between complexes</p> Signup and view all the answers

    How many electrons are taken from CoQH2 in complex III?

    <p>2</p> Signup and view all the answers

    What is the role of Fe-S centers in complex III?

    <p>To transfer electrons</p> Signup and view all the answers

    What happens to the electron that is sent through Cyt c1 in complex III?

    <p>It is dropped to Cyt c</p> Signup and view all the answers

    What happens to CoQ after it gains two electrons in complex III?

    <p>It is recycled</p> Signup and view all the answers

    What is the function of Cyt b in the electron transport chain?

    <p>To transfer electrons</p> Signup and view all the answers

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

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

    What happens to the one electron that is sent through Fe-S centers and Cyt c1 in complex III?

    <p>It is dropped to the mobile carrier</p> Signup and view all the answers

    What happens to the one electron that is sent through Cyt b in complex III?

    <p>It is dropped to CoQ</p> Signup and view all the answers

    What is the prosthetic group of cytochromes?

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

    What is the iron atom in heme bonded to?

    <p>4 N atoms of the porphyrin ring</p> Signup and view all the answers

    How many electrons are taken from CoQH2 in complex III?

    <p>2</p> Signup and view all the answers

    What is the function of Cyt c1 in complex III?

    <p>To drop an electron to the mobile carrier</p> Signup and view all the answers

    What is the function of Cyt b in complex III?

    <p>To drop an electron to CoQ</p> Signup and view all the answers

    What happens to CoQ after it gains 2 electrons in complex III?

    <p>It will be recycled</p> Signup and view all the answers

    What is the name of the mobile carrier that receives an electron from Cyt c1 in complex III?

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

    What is the name of the mobile carrier that receives an electron from Cyt b in complex III?

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

    What is the name of the group of iron-sulfur proteins that are involved in electron transfer in complex III?

    <p>Fe-S centers</p> Signup and view all the answers

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