Photosynthesis and ATP Synthesis Process Quiz
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Questions and Answers

Which process is responsible for the synthesis of ATP from ADP and inorganic phosphate in the presence of light?

  • Photophosphorylation (correct)
  • Oxidative phosphorylation
  • Cellular respiration
  • Fermentation
  • What is the name of the process that occurs when both photosystems I and II work in a series?

  • Oxidative phosphorylation
  • Cyclic photophosphorylation
  • Non-cyclic photophosphorylation (correct)
  • Substrate-level phosphorylation
  • Which pigment is involved in the initial light absorption in photosystem I?

  • Chlorophyll b
  • Chlorophyll a
  • Carotenoids
  • Chlorophyll P700 (correct)
  • Which of the following is produced during cyclic photophosphorylation?

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

    Where does cyclic photophosphorylation potentially occur in the chloroplast?

    <p>Stroma lamellae</p> Signup and view all the answers

    What is the primary function of the electron transport chain in photosynthesis?

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

    Which of the following statements about cyclic photophosphorylation is correct?

    <p>It occurs when only light of wavelengths beyond 680 nm is available for excitation.</p> Signup and view all the answers

    According to the chemiosmotic hypothesis, what is the primary cause of the proton gradient across the thylakoid membrane?

    <p>The splitting of water molecules on the inner side of the membrane.</p> Signup and view all the answers

    Where does the accumulation of protons occur during the light reactions of photosynthesis?

    <p>In the lumen of the thylakoids.</p> Signup and view all the answers

    What is the primary role of the proton gradient across the thylakoid membrane?

    <p>To drive the synthesis of ATP through chemiosmosis.</p> Signup and view all the answers

    Which of the following statements about the light reactions of photosynthesis is correct?

    <p>They result in the production of ATP and NADPH.</p> Signup and view all the answers

    What is the primary function of the photosystems (I and II) in the light reactions of photosynthesis?

    <p>To absorb light energy and excite electrons.</p> Signup and view all the answers

    Which of the following is NOT a product of the light reaction in photosynthesis?

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

    What is the role of the proton gradient created across the thylakoid membrane during the light reaction?

    <p>It drives the synthesis of ATP by ATP synthase</p> Signup and view all the answers

    Which of the following pigments is primarily responsible for absorbing light energy during the light reaction?

    <p>Chlorophyll a</p> Signup and view all the answers

    What is the role of the CF1 portion of the ATP synthase enzyme?

    <p>It undergoes a conformational change due to the proton gradient</p> Signup and view all the answers

    Which of the following processes directly depends on the presence of light?

    <p>Light reaction</p> Signup and view all the answers

    What is the primary function of NADPH produced during the light reaction?

    <p>To reduce carbon dioxide in the Calvin cycle</p> Signup and view all the answers

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