Ch 4: The structure of a chloroplast
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Questions and Answers

What is the function of thylakoids in a chloroplast?

  • Capture light energy during photosynthesis (correct)
  • Site for light-independent reactions
  • Facilitate gaseous exchange within the chloroplast
  • Store nutrients for the plant cell

Which pigment is found in thylakoids and captures light energy?

  • Carotenoid
  • Phytochrome
  • Chlorophyll (correct)
  • Xanthophyll

What is a granum in the context of a chloroplast?

  • A type of pigment found in chloroplasts
  • A site for water absorption
  • A region for carbohydrate synthesis
  • A stack of thylakoid membranes (correct)

Which structure resembles stacks of coins within a chloroplast?

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

Which process occurs within the thylakoids of a chloroplast?

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

What is the primary function of grana in a chloroplast?

<p>Utilization of light energy (D)</p> Signup and view all the answers

Which of the following is NOT a component of a chloroplast?

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

What role does chlorophyll play in a chloroplast during photosynthesis?

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

Which organelle is known as the 'powerhouse of the plant cell'?

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

Where does the conversion of light energy into chemical energy occur in a chloroplast?

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

What is the function of lamellae within the chloroplast?

<p>Facilitate exchange of materials between adjacent thylakoids (C)</p> Signup and view all the answers

Where are glucose molecules produced during photosynthesis stored in plants?

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

What is the role of stroma in photosynthesis?

<p>Catalyze the fixation of carbon dioxide (C)</p> Signup and view all the answers

Which structure protects the chloroplast from damage and regulates the passage of substances?

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

What is the function of chloroplast DNA?

<p>Encode essential genes for photosynthesis (B)</p> Signup and view all the answers

Why are grana structures important in chloroplasts?

<p>Maximize surface area for light absorption (A)</p> Signup and view all the answers

Which part of the chloroplast is responsible for synthesizing carbohydrates like glucose?

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

What does the interconnected network of lamellae ensure within the chloroplast?

<p>Coordination of photosynthetic processes (A)</p> Signup and view all the answers

Which part of the chloroplast structure can be described as a fluid-filled matrix?

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

What role does the double membrane play in the chloroplast?

<p>Protects the chloroplast and regulates substance passage (B)</p> Signup and view all the answers

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

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

What is the primary function of grana within a chloroplast?

<p>Facilitate the capture and utilization of light energy (C)</p> Signup and view all the answers

Which structure in a chloroplast resembles stacks of coins?

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

What is the role of lamellae within a chloroplast?

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

Where is chlorophyll found within a chloroplast?

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

What key products are generated ultimately from the light energy captured within a chloroplast?

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

Which organelle is responsible for conducting photosynthesis within plant cells?

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

Which site within a chloroplast is crucial for driving the synthesis of carbohydrates?

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

What is the function of thylakoids in a chloroplast?

<p>Facilitate light-dependent reactions of photosynthesis (D)</p> Signup and view all the answers

Which component of a chloroplast plays a key role in converting light energy into chemical energy?

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

What is the function of lamellae within the chloroplast?

<p>Provide structural support and facilitate material exchange (D)</p> Signup and view all the answers

Where are glucose molecules produced during photosynthesis stored in plants?

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

Which structure protects the chloroplast from damage and regulates the passage of substances?

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

What is the primary function of grana in a chloroplast?

<p>Facilitate light absorption for photosynthesis (D)</p> Signup and view all the answers

Which structure resembles stacks of coins within a chloroplast?

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

What role does the double membrane play in the chloroplast?

<p>Protect and regulate substance passage (C)</p> Signup and view all the answers

Which of the following is NOT a function of stroma within the chloroplast?

<p>Regulation of light absorption (A)</p> Signup and view all the answers

By what process do chloroplast DNA-encoded genes contribute to photosynthesis?

<p>Synthesize the structure-essential proteins (C)</p> Signup and view all the answers

What does the interconnected network of lamellae ensure within the chloroplast?

<p>Coordination of photosynthetic processes (D)</p> Signup and view all the answers

Which part of the chloroplast is responsible for synthesizing carbohydrates like glucose?

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

Which organelle is often referred to as the 'powerhouse of the plant cell'?

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

What is the primary function of lamellae within the chloroplast?

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

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

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

Which structure within the chloroplast resembles stacks of coins?

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

What is a major function of granum (grana) in a chloroplast?

<p>Converting light into chemical energy (C)</p> Signup and view all the answers

Which structure is crucial for driving the synthesis of carbohydrates within the chloroplast?

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

What is the primary role of chlorophyll in photosynthesis?

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

What does the interconnected network of lamellae ensure within the chloroplast?

<p>Efficient transfer of materials (D)</p> Signup and view all the answers

Where is chlorophyll predominantly found within the chloroplast?

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

What key products are ultimately generated from the light energy captured in a chloroplast?

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

What is the role of lamellae in a chloroplast?

<p>Provide structural support (B)</p> Signup and view all the answers

Which structure in a chloroplast functions primarily in the light-independent reactions of photosynthesis?

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

What is the function of starch granules in a chloroplast?

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

Where is the synthesis of carbohydrates like glucose primarily carried out within a chloroplast?

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

Which component of a chloroplast generates proteins required for chloroplast structure maintenance and photosynthetic reactions?

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

What key role does the double membrane of a chloroplast play?

<p>Regulating material passage (B)</p> Signup and view all the answers

Which structure directly encodes genes for essential proteins involved in photosynthesis processes?

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

What is the primary function of grana in a chloroplast?

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

Where are glucose molecules produced during photosynthesis stored within plants?

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

Which part of a chloroplast plays a significant role in the coordination of photosynthetic processes?

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

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