Master the Mammalian Electron Transport Chain
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Questions and Answers

What is the function of Complex I in the electron transport chain?

  • Catalyzes the reduction of O2 to H2O
  • Catalyzes the reduction of ATP to ADP
  • Catalyzes the oxidation of NADH, with reduction of coenzyme Q (correct)
  • Catalyzes the oxidation of FADH2, with reduction of coenzyme Q

Which molecule is reduced in Complex I of the electron transport chain?

  • FMN
  • NADH
  • NAD+
  • CoQ (correct)

What is the function of a prosthetic group?

  • A molecule that is not required for function of enzymes
  • A complex molecule that is a polypeptide and required for function of enzymes
  • A simple molecule that is required for function of enzymes
  • A complex molecule that is non-polypeptide and required for function of enzymes (correct)

What is the function of FMN in Complex I of the electron transport chain?

<p>To donate 1 electron at a time to Fe-S centers (A)</p> Signup and view all the answers

What is the role of CoQ in the electron transport chain?

<p>To accept electrons from Complex I and II and pass them to Complex III (D)</p> Signup and view all the answers

Which of the following is a subunit of Complex I in mammals?

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

What is the final electron acceptor in the electron transport chain?

<p>O2 (B)</p> Signup and view all the answers

What is the function of Complex III in the electron transport chain?

<p>Catalyzes the transfer of electrons from CoQ to cyt c (D)</p> Signup and view all the answers

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