Ch 4: The definition of photosynthesis
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Questions and Answers

What is the role of ATP synthase in photosynthesis?

  • It splits water molecules
  • It releases oxygen gas
  • It drives the synthesis of ATP (correct)
  • It helps in carbon fixation

    • What is the function of NADPH in photosynthesis?

  • Capturing sunlight energy
  • Releasing oxygen gas
  • Generating high-energy electrons (correct)
  • Assisting in ATP production

    • What is the byproduct of water molecule splitting during photosynthesis?

  • Oxygen gas (correct)
  • Chlorophyll
  • Carbon dioxide
  • Glucose

    • Where does the Calvin cycle take place in the chloroplast?

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

    What is the primary end product of photosynthesis?

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

    Which organelle is responsible for photosynthesis in plant cells?

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

    What is the role of chlorophyll in photosynthesis?

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

    Where do the light-dependent reactions of photosynthesis occur?

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

    What provides the reducing power needed to convert carbon dioxide into carbohydrates in photosynthesis?

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

    What is the purpose of radiant energy in photosynthesis?

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

    What is the primary purpose of photosynthesis?

    <p>To convert light energy into chemical energy</p> Signup and view all the answers

    Where does photosynthesis predominantly occur in plant cells?

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

    What is the function of chlorophyll in photosynthesis?

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

    Which stage of photosynthesis involves the absorption of light energy by chlorophyll?

    <p>Light-dependent reactions</p> Signup and view all the answers

    What happens to the electrons during the light-dependent reactions of photosynthesis?

    <p>They release energy as they move through an electron transport chain</p> Signup and view all the answers

    What do the light-independent reactions in photosynthesis involve?

    <p>Using energy from the light-dependent reactions to convert carbon dioxide into glucose</p> Signup and view all the answers

    Which of the following is NOT a direct outcome of photosynthesis?

    <p>Conversion of glucose into light energy</p> Signup and view all the answers

    How are protons (H⁺ ions) utilized during photosynthesis?

    <p>To pump from the stroma into the thylakoid space</p> Signup and view all the answers

    Which structure within the chloroplasts is responsible for the absorption of light energy?

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

    Why is understanding photosynthesis important?

    <p>It unveils the biochemical mechanisms driving plant growth and ecosystem productivity</p> Signup and view all the answers

    What is the primary purpose of photosynthesis?

    <p>Produce oxygen and store glucose</p> Signup and view all the answers

    Where do the light-dependent reactions of photosynthesis occur?

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

    Why is chlorophyll important in photosynthesis?

    <p>To absorb light energy for the photosynthetic process</p> Signup and view all the answers

    During photosynthesis, where are protons (H⁺ ions) pumped from and into?

    <p>Pumped from the thylakoid space to the stroma</p> Signup and view all the answers

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

    <p>Transfer excited electrons along the thylakoid membrane</p> Signup and view all the answers

    What is the primary product of the light-dependent reactions in photosynthesis?

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

    In photosynthesis, where are the light-independent reactions specifically known to occur?

    <p>Chloroplast stroma</p> Signup and view all the answers

    What do the chlorophyll-containing thylakoids primarily absorb during photosynthesis?

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

    What newly formed molecule is utilized during the light-independent reactions of photosynthesis?

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

    What are the two main stages of photosynthesis, as detailed in the text?

    <p>Light-dependent and light-independent reactions</p> Signup and view all the answers

    What process in photosynthesis involves the synthesis of adenosine triphosphate (ATP)?

    <p>Light-Dependent Reactions</p> Signup and view all the answers

    What is the primary function of NADPH in the context of photosynthesis?

    <p>Formation of Carbohydrates</p> Signup and view all the answers

    Which structure within the chloroplast is responsible for splitting water molecules in photosynthesis?

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

    During which phase of photosynthesis are carbon dioxide (CO₂) molecules fixed into organic molecules?

    <p>Carbon Fixation</p> Signup and view all the answers

    In photosynthesis, where do the light-dependent reactions primarily take place?

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

    What is the initial energy source for the synthesis of ATP in photosynthesis?

    <p>Radiant Energy</p> Signup and view all the answers

    Which pigment is primarily responsible for capturing light energy during photosynthesis?

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

    What is the eventual outcome of the series of enzyme-mediated reactions that convert fixed carbon dioxide into carbohydrates in photosynthesis?

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

    Which fluid-filled region surrounds the thylakoids and is involved in the Calvin cycle of photosynthesis?

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

    What releases oxygen gas as a byproduct in photosynthesis and is crucial for sustaining aerobic respiration?

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

    What is the primary function of the light-dependent reactions in photosynthesis?

    <p>Split water molecules to release oxygen</p> Signup and view all the answers

    Which component within chloroplasts absorbs radiant energy from sunlight during photosynthesis?

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

    What is the primary source of energy that excites electrons in chlorophyll during photosynthesis?

    <p>Visible light</p> Signup and view all the answers

    In photosynthesis, what is the function of the electron transport chain within the thylakoid membrane?

    <p>Facilitate the movement of electrons and energy transfer</p> Signup and view all the answers

    During photosynthesis, where are protons (H⁺ ions) primarily pumped to by the electron transport chain?

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

    What is the key role of ATP synthase in the context of photosynthesis?

    <p>Convert ADP to ATP using proton gradient</p> Signup and view all the answers

    Which region within chloroplasts is directly involved in the Calvin cycle of photosynthesis?

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

    What is the primary function of the light-independent reactions (Calvin cycle) in photosynthesis?

    <p>Utilize ATP and NADPH to fix carbon dioxide</p> Signup and view all the answers

    During the Calvin cycle of photosynthesis, how do plants primarily fix carbon dioxide into organic molecules?

    <p>With the help of Rubisco enzyme</p> Signup and view all the answers

    What is the end result of the light-dependent reactions in photosynthesis?

    <p>Release of oxygen</p> Signup and view all the answers

    Which process in photosynthesis directly contributes to the synthesis of ATP?

    <p>ATP synthase-driven proton flow</p> Signup and view all the answers

    What is the primary function of NADPH in photosynthesis?

    <p>High-energy electron carrier</p> Signup and view all the answers

    Which enzyme facilitated process involves fixing carbon dioxide into organic molecules?

    <p>Carbon fixation</p> Signup and view all the answers

    What is the primary end product of the light-independent reactions in photosynthesis?

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

    How is radiant energy utilized in photosynthesis?

    <p>Driving photosynthesis reactions</p> Signup and view all the answers

    Which molecule's splitting event during photosynthesis directly releases oxygen gas as a byproduct?

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

    What is the role of ATP and NADPH in the light-independent reactions of photosynthesis?

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

    Where do the light-dependent reactions of photosynthesis primarily occur?

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

    What organelle within plant cells primarily facilitates the process of photosynthesis?

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

    What particular role does chlorophyll play in photosynthesis?

    <p>Absorption of radiant energy</p> Signup and view all the answers

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