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

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

<p>CoQH2 (D)</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 (B)</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 (C)</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 (A)</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 (B)</p> Signup and view all the answers

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

<p>cytochrome c (B)</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 (D)</p> Signup and view all the answers

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

<p>succinate (C)</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 (A)</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 (B)</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 (B)</p> Signup and view all the answers

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

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

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

<p>CoQH2 (D)</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 (A)</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 (C)</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 (D)</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 (B)</p> Signup and view all the answers

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

<p>cytochrome c (D)</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 (A)</p> Signup and view all the answers

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

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

What is the function of FADH2 in Complex 2?

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

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

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

Which subunit forms the functional core of Complex III?

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

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

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

What is the electron donor to Complex IV?

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

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

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

What is the mobile carrier in Complex III?

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

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

<p>FADH2 (B)</p> Signup and view all the answers

What is the name of the enzyme in Complex III?

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

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

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

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

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

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

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

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