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

What is the primary end product of photosynthesis?

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

Which organelle is responsible for photosynthesis in plant cells?

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

What is the role of chlorophyll in photosynthesis?

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

Where do the light-dependent reactions of photosynthesis occur?

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

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

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

What is the purpose of radiant energy in photosynthesis?

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

What is the primary purpose of photosynthesis?

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

Where does photosynthesis predominantly occur in plant cells?

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

What is the function of chlorophyll in photosynthesis?

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

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

<p>Light-dependent reactions (D)</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 (C)</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 (B)</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 (B)</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 (B)</p> Signup and view all the answers

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

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

Why is understanding photosynthesis important?

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

What is the primary purpose of photosynthesis?

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

Where do the light-dependent reactions of photosynthesis occur?

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

Why is chlorophyll important in photosynthesis?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

<p>Chlorophyll (C)</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 (B)</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 (A)</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 (D)</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 (C)</p> Signup and view all the answers

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

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

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

<p>Visible light (C)</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 (B)</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 (A)</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 (D)</p> Signup and view all the answers

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

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

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

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

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

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

What is the primary function of NADPH in photosynthesis?

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

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

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

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

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

How is radiant energy utilized in photosynthesis?

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

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

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

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

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

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

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

What particular role does chlorophyll play in photosynthesis?

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

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