Ch 4: The process of photosynthesis
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Questions and Answers

What is the main purpose of photosynthesis?

  • To release oxygen atoms
  • To convert sunlight into chemical energy (correct)
  • To liberate hydrogen ions
  • To provide radiant energy

    • Where does the light-dependent phase of photosynthesis take place?

  • Mitochondria
  • Cytoplasm
  • Thylakoid membranes of the grana (correct)
  • Nucleus

    • What are the primary receptors of sunlight in photosynthesis?

  • Oxygen atoms
  • Water molecules
  • Energy-rich hydrogen ions
  • Chlorophyll pigments (correct)

    • What is the process where water molecules split into oxygen atoms and hydrogen ions?

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

    Which organelle is responsible for photosynthesis in plant cells?

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

    What is the ultimate product of the light-dependent phase of photosynthesis?

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

    Which part of the chloroplast contains chlorophyll pigments?

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

    What is the primary source of energy for photosynthesis?

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

    Which molecules are drawn into chloroplasts during photosynthesis?

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

    What is the radiant energy harnessed by during photosynthesis?

    <p>Sunlight</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 phase of photosynthesis is characterized by the assimilation of carbon dioxide and the synthesis of carbohydrates?

    <p>Light-Independent Phase</p> Signup and view all the answers

    Where does the formation of adenosine triphosphate (ATP) primarily happen in photosynthesis?

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

    Which phase of photosynthesis proceeds regardless of the presence of light?

    <p>Light-Independent Phase</p> Signup and view all the answers

    What serves as a molecular reservoir of energy in photosynthesis?

    <p>Hydrogen ions</p> Signup and view all the answers

    Where is excess glucose, the primary end product of photosynthesis, often stored within plant cells?

    <p>Starch granules</p> Signup and view all the answers

    Which phase of photosynthesis generates oxygen and hydrogen ions?

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

    What is the main purpose of the ATP generated in the light-dependent phase of photosynthesis?

    <p>Energy reservoir for biochemical reactions</p> Signup and view all the answers

    In which organelle does the light-independent phase of photosynthesis predominantly occur?

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

    What is the primary function of excess glucose stored in plant cells?

    <p>Energy source for metabolic activities</p> Signup and view all the answers

    What is the energetic outcome of the light-dependent phase of photosynthesis?

    <p>Release of oxygen atoms and energy-rich hydrogen ions</p> Signup and view all the answers

    Which structure within the chloroplasts serves as the primary recipient of sunlight during photosynthesis?

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

    What happens during the process of photolysis in photosynthesis?

    <p>Water molecules split into oxygen atoms and energy-rich hydrogen ions</p> Signup and view all the answers

    Which bio-molecule is synthesized as a direct result of the light-dependent phase of photosynthesis?

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

    In photosynthesis, what is the primary function of the energy-rich hydrogen ions produced from photolysis?

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

    Which process occurs first during the light-dependent phase of photosynthesis?

    <p>Photolysis of water molecules</p> Signup and view all the answers

    What is the role of chlorophyll pigments within the thylakoid membranes of chloroplasts during photosynthesis?

    <p>Absorb sunlight and initiate the photosynthetic cascade</p> Signup and view all the answers

    Which molecule is the primary carrier of chemical energy in photosynthesis?

    <p>Adenosine triphosphate (ATP)</p> Signup and view all the answers

    During the light-dependent phase of photosynthesis, where do water molecules undergo splitting to liberate oxygen atoms?

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

    Which phase of photosynthesis is primarily responsible for converting radiant energy into chemical energy?

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

    What is the primary function of hydrogen ions generated in the light-dependent phase of photosynthesis?

    <p>To serve as fuel for subsequent biochemical reactions</p> Signup and view all the answers

    Where does the light-independent phase of photosynthesis primarily take place?

    <p>In the stroma of chloroplasts</p> Signup and view all the answers

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

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

    Which phase of photosynthesis proceeds autonomously from external luminous stimuli?

    <p>Light-independent phase</p> Signup and view all the answers

    What is the key role of ATP in photosynthesis?

    <p>Store energy for future reactions</p> Signup and view all the answers

    Which organelle houses the machinery for the Calvin cycle phase of photosynthesis?

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

    What is the primary energy source that drives the formation of ATP in photosynthesis?

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

    How does excess glucose, the end product of photosynthesis, benefit the plant?

    <p>Stores energy for metabolic processes</p> Signup and view all the answers

    What is the ultimate fate of excess glucose produced by plants during photosynthesis?

    <p>It provides energy for growth and metabolism</p> Signup and view all the answers

    Which phase of photosynthesis is characterized by the assimilation of carbon dioxide and the synthesis of carbohydrates?

    <p>Light-independent phase</p> Signup and view all the answers

    During photosynthesis, what serves as a potent fuel for subsequent biochemical reactions?

    <p>Hydrogen ions</p> Signup and view all the answers

    Where does the process of phosphorylation occur in photosynthesis?

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

    What is the primary function of adenosine triphosphate (ATP) in photosynthesis?

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

    Where is the excess glucose, the primary end product of photosynthesis, often stored?

    <p>Starch granules</p> Signup and view all the answers

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

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

    Which phase of photosynthesis takes place regardless of the presence of light?

    <p>Light-independent phase</p> Signup and view all the answers

    What is the main role of carbon dioxide in the light-independent phase of photosynthesis?

    <p>Facilitator of carbohydrate synthesis</p> Signup and view all the answers

    Which specific structure within the chloroplast contains the intricate machinery of the Calvin cycle?

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

    What is the primary role of excess glucose stored in the plant cells?

    <p>Fuel for metabolic processes</p> Signup and view all the answers

    Which phase of photosynthesis characteristically involves a series of enzymatically mediated reactions?

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

    What is the primary function of chlorophyll pigments in the light-dependent phase of photosynthesis?

    <p>Serve as receptors of radiant energy</p> Signup and view all the answers

    Which process occurs under the influence of sunlight in the light-dependent phase of photosynthesis?

    <p>Photolysis of water</p> Signup and view all the answers

    Where does water molecules undergo splitting in the light-dependent phase of photosynthesis?

    <p>Within the chloroplasts</p> Signup and view all the answers

    What is the main source of energy for the conversion of radiant energy into chemical energy in photosynthesis?

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

    What is the fate of oxygen atoms liberated during the light-dependent phase of photosynthesis?

    <p>Released into the atmosphere</p> Signup and view all the answers

    Where within the chloroplasts do chlorophyll pigments predominantly serve as receptors of sunlight?

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

    What initiates the photosynthetic cascade in the light-dependent phase?

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

    What happens to energy-rich hydrogen ions liberated during photolysis in the light-dependent phase?

    <p>Contribute to ATP production</p> Signup and view all the answers

    Which phase of photosynthesis involves the absorption of radiant energy from the sun?

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

    What drives the process of photolysis in the light-dependent phase?

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

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