Chloroplasts and Photosynthesis
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Questions and Answers

What are the thylakoids?

  • Fluid-filled internal space of the chloroplasts
  • Flat membranous tubules connecting the thylakoids
  • Stacks of structures called grana
  • Membrane-bound compartments inside chloroplasts (correct)

    • What role do chloroplasts play for life on Earth?

  • Oxygen release through photosynthesis (correct)
  • Starch storage for plants
  • Protein synthesis for plant growth
  • Energy production through chemiosmosis

    • Where does photosynthesis take place in plant cells?

  • Stroma (correct)
  • Thylakoid lumen
  • Golgi apparatus
  • Outer membrane

    • What is the function of the thylakoid lumen?

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

    What are grana in chloroplasts?

    <p>Stacks of structures called thylakoids</p> Signup and view all the answers

    What is the function of the stroma in chloroplasts?

    <p>Calvin cycle and enzyme storage</p> Signup and view all the answers

    Where do the light-dependent reactions of photosynthesis take place in plants?

    <p>Thylakoid membranes</p> Signup and view all the answers

    Which molecule is released as a byproduct of the process of photosynthesis?

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

    What are the two molecules made in the light-dependent reactions that are needed for the next stage of photosynthesis?

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

    What is the special pair of chlorophyll molecules at the core of photosystem I called?

    <p>P700</p> Signup and view all the answers

    What type of photophosphorylation involves using light energy to make ATP from ADP?

    <p>Non-cyclic photophosphorylation</p> Signup and view all the answers

    What happens to the oxygen molecule produced during the light-dependent reactions?

    <p>It is released outside the leaf through the stomata.</p> Signup and view all the answers

    Which part of the chloroplast contains the thylakoid membranes where the light-dependent reactions occur?

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

    What role do photosystems play in the light reactions?

    <p>Harvesting light energy and initiating electron transport.</p> Signup and view all the answers

    What are the two types of photosystems involved in the light-dependent reactions?

    <p>Photosystem I (PSI) and Photosystem II (PSII)</p> Signup and view all the answers

    What happens to P680 after it loses its electron during the light-dependent reactions?

    <p>It becomes positively charged (P680+).</p> Signup and view all the answers

    What is the main function of thylakoid lumen in chloroplasts?

    <p>It is the site of ATP synthesis through chemiosmosis</p> Signup and view all the answers

    What is the main role of stroma in chloroplasts?

    <p>It contains the enzymes needed for the Calvin cycle</p> Signup and view all the answers

    Where do the light-dependent reactions of photosynthesis take place?

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

    What are grana in chloroplasts made up of?

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

    What is the main function of chloroplasts in sustaining plant growth and crop yield?

    <p>Production of energy through photosynthesis</p> Signup and view all the answers

    What is the main function of outer membrane of chloroplasts?

    <p>Freely permeable to small molecules</p> Signup and view all the answers

    What is the main purpose of the light-dependent reactions in photosynthesis?

    <p>Create ATP and NADPH for the next stage of photosynthesis</p> Signup and view all the answers

    Where do the light-dependent reactions of photosynthesis take place in plants?

    <p>Thylakoid membranes</p> Signup and view all the answers

    What is the function of the special pair of chlorophyll molecules found at the core of photosystem II?

    <p>Harvest light energy</p> Signup and view all the answers

    What happens to the oxygen molecule produced during the light-dependent reactions?

    <p>It is released outside the leaf through the stomata</p> Signup and view all the answers

    What is the role of photosystems in the light reactions?

    <p>Harvest light energy and play a key role in the light reactions</p> Signup and view all the answers

    What is the special pair of photosystem I called?

    <p>P700</p> Signup and view all the answers

    What happens to P680 after it loses its electron during the light-dependent reactions?

    <p>It becomes positively charged (P680+)</p> Signup and view all the answers

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