Chloroplasts and Photosynthesis
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Questions and Answers

What are the thylakoids?

  • Fluid-filled internal space of the chloroplasts
  • Flat membranous tubules connecting the thylakoids
  • Stacks of structures called grana
  • Membrane-bound compartments inside chloroplasts (correct)

What role do chloroplasts play for life on Earth?

  • Oxygen release through photosynthesis (correct)
  • Starch storage for plants
  • Protein synthesis for plant growth
  • Energy production through chemiosmosis

Where does photosynthesis take place in plant cells?

  • Stroma (correct)
  • Thylakoid lumen
  • Golgi apparatus
  • Outer membrane

What is the function of the thylakoid lumen?

<p>ATP synthesis through chemiosmosis (A)</p> Signup and view all the answers

What are grana in chloroplasts?

<p>Stacks of structures called thylakoids (D)</p> Signup and view all the answers

What is the function of the stroma in chloroplasts?

<p>Calvin cycle and enzyme storage (A)</p> Signup and view all the answers

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

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

Which molecule is released as a byproduct of the process of photosynthesis?

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

What are the two molecules made in the light-dependent reactions that are needed for the next stage of photosynthesis?

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

What is the special pair of chlorophyll molecules at the core of photosystem I called?

<p>P700 (D)</p> Signup and view all the answers

What type of photophosphorylation involves using light energy to make ATP from ADP?

<p>Non-cyclic photophosphorylation (B)</p> Signup and view all the answers

What happens to the oxygen molecule produced during the light-dependent reactions?

<p>It is released outside the leaf through the stomata. (C)</p> Signup and view all the answers

Which part of the chloroplast contains the thylakoid membranes where the light-dependent reactions occur?

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

What role do photosystems play in the light reactions?

<p>Harvesting light energy and initiating electron transport. (D)</p> Signup and view all the answers

What are the two types of photosystems involved in the light-dependent reactions?

<p>Photosystem I (PSI) and Photosystem II (PSII) (C)</p> Signup and view all the answers

What happens to P680 after it loses its electron during the light-dependent reactions?

<p>It becomes positively charged (P680+). (B)</p> Signup and view all the answers

What is the main function of thylakoid lumen in chloroplasts?

<p>It is the site of ATP synthesis through chemiosmosis (A)</p> Signup and view all the answers

What is the main role of stroma in chloroplasts?

<p>It contains the enzymes needed for the Calvin cycle (A)</p> Signup and view all the answers

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

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

What are grana in chloroplasts made up of?

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

What is the main function of chloroplasts in sustaining plant growth and crop yield?

<p>Production of energy through photosynthesis (B)</p> Signup and view all the answers

What is the main function of outer membrane of chloroplasts?

<p>Freely permeable to small molecules (D)</p> Signup and view all the answers

What is the main purpose of the light-dependent reactions in photosynthesis?

<p>Create ATP and NADPH for the next stage of photosynthesis (D)</p> Signup and view all the answers

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

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

What is the function of the special pair of chlorophyll molecules found at the core of photosystem II?

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

What happens to the oxygen molecule produced during the light-dependent reactions?

<p>It is released outside the leaf through the stomata (D)</p> Signup and view all the answers

What is the role of photosystems in the light reactions?

<p>Harvest light energy and play a key role in the light reactions (A)</p> Signup and view all the answers

What is the special pair of photosystem I called?

<p>P700 (A)</p> Signup and view all the answers

What happens to P680 after it loses its electron during the light-dependent reactions?

<p>It becomes positively charged (P680+) (A)</p> Signup and view all the answers

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