Chloroplasts and Photosynthesis Quiz
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Questions and Answers

What is the primary function of carbon fixation in photosynthesis?

  • To produce oxygen gas as a byproduct
  • To release stored glucose for energy use
  • To break down water molecules for electron transfer
  • To convert carbon dioxide into a usable form by plants (correct)

    • How does limited light exposure impact the rate of photosynthesis in plants?

  • It increases the efficiency of the Calvin Cycle
  • It decreases the activity of Rubisco enzyme
  • It slows down the rate of carbon fixation (correct)
  • It reduces the production of ATP and NADPH

    • What is the role of chlorophyll molecules in the light reactions of photosynthesis?

  • Absorb and transfer light energy to the reaction center (correct)
  • Convert carbon dioxide into glucose in the stroma
  • Facilitate the regeneration of RuBP in the Calvin Cycle
  • Generate ATP and NADPH through chemiosmosis

    • Why is the electron transport chain important in the light reactions of photosynthesis?

    <p>To generate ATP and NADPH for the Calvin Cycle</p> Signup and view all the answers

    Where are sugars made in the chloroplast?

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

    Which of the following is a true statement concerning the role of redox reactions in photosynthesis and cellular respiration?

    <p>In photosynthesis, carbon dioxide is reduced to form sugar; in respiration, sugar is oxidized to form carbon dioxide</p> Signup and view all the answers

    Which of the following is not a difference between photosynthesis and cellular respiration?

    <p>Photosynthesis consumes CO2; respiration consumes )2</p> Signup and view all the answers

    What is the location of chlorophyll in a plant cell?

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

    Where do the reactions of the Calvin cycle take place?

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

    Which of the following are produced during the light reactions of photosynthesis?

    <p>ATP, NADPH, O2</p> Signup and view all the answers

    Which of the following are produced during the dark reactions of photosynthesis?

    <p>ATP, NADPH, CO2</p> Signup and view all the answers

    Which of the following does the Calvin cycle involve?

    <p>Formation of waste products in the form of CO2</p> Signup and view all the answers

    How do the reaction centers of photosystems I and II differ?

    <p>Both b and c</p> Signup and view all the answers

    Why do green plants appear green to human eyes?

    <p>Mainly red and blue wavelengths are absorbed, while the green is reflected</p> Signup and view all the answers

    During noncyclic electron flow, where are electrons replaced in photosystem I?

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

    What supplies the energy that excites P680 and P700 in photosystems I and II?

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

    What is used to transport H+ from the stroma to the thylakoid compartment in chemiosmosis?

    <p>H+.grana.electrons</p> Signup and view all the answers

    Which step does not occur during the Calvin cycle?

    <p>Formation of waste products in the form of CO2</p> Signup and view all the answers

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