Photosynthesis and Cellular Respiration Mechanisms Quiz
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Questions and Answers

What is the primary function of the stacks of thylakoid sacs known as 'Grana'?

  • Production of NADPH
  • Electron transfer chain
  • Formation of O2, NADPH, and ATP (correct)
  • Harvesting light energy
  • Which scientist introduced an artificial electron acceptor (Hill Reagent) that shows the light dependency of electron flow in photosynthesis?

  • Ochoa
  • Planck
  • Hill
  • Robert Hill (correct)
  • What role does NADP+ play in photosynthesis according to the text?

  • Oxygen generator
  • Electron donor
  • ATP producer
  • Electron acceptor (correct)
  • How is the energy required for ATP synthesis related to the energy of photons in visible light?

    <p>10 times higher than the energy of photons in visible light</p> Signup and view all the answers

    What is the main function of the F0F1 complexes located on the outer surface of the thylakoid membranes?

    <p>Facilitate ATP synthesis through the chemiosmotic mechanism</p> Signup and view all the answers

    What effect does venturicidin, a mitochondrial ATP synthesis blocker, have on ATP synthesis?

    <p>Prevents ATP synthesis in the stroma</p> Signup and view all the answers

    What is the significance of the chemiosmotic mechanism in ATP synthesis?

    <p>It couples ATP synthesis to electron flow</p> Signup and view all the answers

    Why does the movement of 12 protons result in a decrease in pH in the lumen by 3 units?

    <p>It causes a change in the proton concentration in the lumen</p> Signup and view all the answers

    What is the primary function of the Action Spectrum mentioned in the text?

    <p>Describe the relative rate of photosynthesis for different wavelengths of light.</p> Signup and view all the answers

    In the process of Light-Driven Electron Transfer at the Reaction Center, what is Z that serves as the immediate electron donor to P680+?

    <p>A Tyr residue</p> Signup and view all the answers

    What is the final step in the process of Cyclic Electron Transfer at the reaction center of purple bacteria?

    <p>The electron is passed on to the Cytbcf complex.</p> Signup and view all the answers

    What is the role of Bacteriorhodopsin in the process of Light-Driven Proton Pumping?

    <p>Channeling electrons to create a proton gradient.</p> Signup and view all the answers

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