Redox Reactions and Standard Reduction Potential
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Questions and Answers

What is the tendency of the reductant member of a redox pair with a more negative standard reduction potential?

  • to lose electrons (correct)
  • to accept electrons
  • to release energy
  • to form ATP

During the oxidation of one mole of NADH, how many ATP molecules can be synthesized?

  • 3 ATP (correct)
  • 4 ATP
  • 2 ATP
  • 1 ATP

According to the chemiosmotic hypothesis, what is the coupling factor for ATP synthesis?

  • proton pump
  • oxidation reduction
  • proton flow (correct)
  • electron transport

Which of the following is a characteristic of a particular redox pair?

<p>standard reduction potential (B)</p> Signup and view all the answers

What is the direction of proton flow during oxidative phosphorylation?

<p>from the matrix to the intermembrane space (A)</p> Signup and view all the answers

What is the result of the flow of electrons from NADH to oxygen?

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

What is the primary function of ATP in the context of cellular reactions?

<p>To act as an energy carrier to facilitate reactions (C)</p> Signup and view all the answers

What is the primary location of ATP synthesis in the mitochondrion?

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

What is the primary function of the electron transport chain?

<p>To capture energy released from the flow of electrons (A)</p> Signup and view all the answers

What is the net change in free energy (ΔG) for the hydrolysis of ATP to ADP and Pi?

<p>-7300 cal/mol (B)</p> Signup and view all the answers

What is the role of NADH and FADH2 in the electron transport chain?

<p>To donate electrons to the electron transport chain (D)</p> Signup and view all the answers

What is the name of the process by which ATP is produced from ADP and Pi during the electron transport chain?

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

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

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

Where are the complexes of the electron transport chain located?

<p>Inner mitochondrial membrane (D)</p> Signup and view all the answers

What is the role of coenzyme Q in the electron transport chain?

<p>Accepts hydrogen atoms from FMNH2 and FADH2 (C)</p> Signup and view all the answers

What is the product of the reaction catalyzed by NADH dehydrogenase?

<p>FMNH2 and H+ (B)</p> Signup and view all the answers

What is the byproduct of the electron transport chain?

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

What is the function of the iron-sulfur center in NADH dehydrogenase?

<p>Necessary for the transfer of hydrogen (A)</p> Signup and view all the answers

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