Respiration in Plants
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Questions and Answers

What is the role of oxygen in the electron transport system?

  • To act as the final hydrogen acceptor (correct)
  • To synthesize ATP
  • To initiate the electron transport chain
  • To generate proton gradient

    • What is the energy source utilized in oxidative phosphorylation?

  • Proton gradient energy
  • Electrochemical energy
  • Oxidation-reduction energy (correct)
  • Light energy

    • During oxidative phosphorylation, how many ATP molecules are produced per electron pair?

  • 2
  • 3 (correct)
  • 1
  • 4

    • What is the direction of proton movement during ATP synthesis?

    <p>From the intermembrane space to the matrix</p> Signup and view all the answers

    What is the location of the electron transport chain?

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

    What is the purpose of the proton gradient in oxidative phosphorylation?

    <p>To generate ATP</p> Signup and view all the answers

    Where is the electron transport system located in the mitochondria?

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

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

    <p>Synthesize ATP</p> Signup and view all the answers

    What is the role of FMN in Complex I?

    <p>To accept electrons from NADH</p> Signup and view all the answers

    What is the function of UQ in the electron transport system?

    <p>To transport electrons from one complex to another</p> Signup and view all the answers

    What is the result of the electron transport system in the mitochondrial inner membrane?

    <p>Generation of ATP</p> Signup and view all the answers

    What is the source of the two electrons donated to Complex I?

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

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

    <p>To act as electron carriers and donate electrons to an electron acceptor</p> Signup and view all the answers

    What is the net ATP yield from the complete breakdown of one glucose molecule?

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

    What is the byproduct of the reaction catalyzed by citrate synthase?

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

    What is the purpose of the electron transport system in the mitochondrial membrane?

    <p>To generate a proton gradient</p> Signup and view all the answers

    What is the role of co-factors in the electron transport system?

    <p>To enhance the activity of enzymes as catalysts</p> Signup and view all the answers

    What is the result of the transfer of electrons from NADH and FADH2 to an electron acceptor?

    <p>The creation of a proton gradient</p> Signup and view all the answers

    Which electron carrier is responsible for the transfer of electrons from FADH2 to Coenzyme Q?

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

    During oxidative phosphorylation, what is the primary function of the proton gradient generated across the inner mitochondrial membrane?

    <p>To synthesize ATP through chemiosmosis</p> Signup and view all the answers

    What is the net result of the electron transport system in terms of ATP production?

    <p>1.5 ATP produced per NADH and 1.5 ATP produced per FADH2</p> Signup and view all the answers

    Which coenzyme plays a critical role in the transfer of electrons from NADH to Coenzyme Q?

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

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

    <p>To synthesize ATP through chemiosmosis</p> Signup and view all the answers

    What is the primary source of energy for the electron transport chain in the mitochondrial inner membrane?

    <p>Energy from the oxidation-reduction reactions of NADH and FADH2</p> Signup and view all the answers

    What is the primary function of the electron transport chain in cellular respiration?

    <p>Establish a proton gradient to drive ATP synthesis</p> Signup and view all the answers

    What is the entry point of acetyl-CoA in the Krebs cycle?

    <p>Citrate synthase</p> Signup and view all the answers

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

    <p>Transfers electrons to the electron transport chain</p> Signup and view all the answers

    What is the net ATP yield from glycolysis?

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

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

    <p>Transfers electrons from NADH to Complex III</p> Signup and view all the answers

    What is the primary function of the electron transport system in the mitochondrial membrane?

    <p>Establish a proton gradient to drive ATP synthesis</p> Signup and view all the answers

    What is the role of cytochrome c in the electron transport chain?

    <p>To act as a mobile carrier for transfer of electrons between complex III and IV</p> Signup and view all the answers

    What is the result of the interaction between UQH2 and Complex III?

    <p>Pumping of 4 protons into the intermembrane space</p> Signup and view all the answers

    What is the component of ATP synthase responsible for forming the channel for proton passage?

    <p>F0</p> Signup and view all the answers

    What is the role of copper centres in Complex IV?

    <p>To facilitate the transfer of electrons to oxygen</p> Signup and view all the answers

    What is the driving force behind the passage of hydrogen through ATP synthase?

    <p>The proton gradient created by the electron transport chain</p> Signup and view all the answers

    What is the byproduct of the reaction catalyzed by Complex IV?

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

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