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 (A)</p> Signup and view all the answers

Which organelle is responsible for photosynthesis in plant cells?

<p>Chloroplasts (A)</p> Signup and view all the answers

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

<p>Oxygen (D)</p> Signup and view all the answers

Which part of the chloroplast contains chlorophyll pigments?

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

What is the primary source of energy for photosynthesis?

<p>Sunlight (A)</p> Signup and view all the answers

Which molecules are drawn into chloroplasts during photosynthesis?

<p>Water (A)</p> Signup and view all the answers

What is the radiant energy harnessed by during photosynthesis?

<p>Sunlight (B)</p> Signup and view all the answers

What is the primary end product of photosynthesis?

<p>Glucose (C)</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 (B)</p> Signup and view all the answers

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

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

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

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

What serves as a molecular reservoir of energy in photosynthesis?

<p>Hydrogen ions (C)</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 (B)</p> Signup and view all the answers

Which phase of photosynthesis generates oxygen and hydrogen ions?

<p>Light-Dependent Phase (C)</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 (B)</p> Signup and view all the answers

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

<p>Chloroplast (A)</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 (A)</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 (A)</p> Signup and view all the answers

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

<p>Thylakoid membranes (A)</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 (C)</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 (A)</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 (D)</p> Signup and view all the answers

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

<p>Photolysis of water molecules (D)</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 (A)</p> Signup and view all the answers

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

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

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

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

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

<p>Glucose (D)</p> Signup and view all the answers

Which phase of photosynthesis proceeds autonomously from external luminous stimuli?

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

What is the key role of ATP in photosynthesis?

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

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

<p>Chloroplast (B)</p> Signup and view all the answers

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

<p>Radiant energy (B)</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 (A)</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 (A)</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 (D)</p> Signup and view all the answers

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

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

Where does the process of phosphorylation occur in photosynthesis?

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

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

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

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

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

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

<p>Glucose (D)</p> Signup and view all the answers

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

<p>Light-independent phase (C)</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 (D)</p> Signup and view all the answers

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

<p>Stroma (D)</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 (A)</p> Signup and view all the answers

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

<p>Calvin cycle (D)</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 (C)</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 (D)</p> Signup and view all the answers

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

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

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

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

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

<p>Sunlight energy (C)</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 (D)</p> Signup and view all the answers

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

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

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

<p>Sunlight (C)</p> Signup and view all the answers

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