Photosynthesis: Powering Life on Earth
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Questions and Answers

What is the primary purpose of the Light-Dependent Reaction in photosynthesis?

  • To produce ATP using sunlight energy (correct)
  • To fix carbon dioxide into organic molecules
  • To convert glucose into oxygen gas
  • To split water into oxygen and hydrogen ions

What is the role of phloem in a plant's transport system?

  • Transport food (sugar) from leaves to other plant parts (correct)
  • Transport water and minerals from roots to leaves
  • Transport oxygen produced during photosynthesis throughout the plant
  • Transport carbon dioxide to be used in photosynthesis

During the Calvin Cycle of photosynthesis, which molecule is primarily fixed into organic compounds?

  • Carbon dioxide (correct)
  • Water
  • Oxygen
  • Glucose

What is the significance of iodine solution turning blue-black when testing a leaf for starch?

<p>It confirms the presence of starch in the leaf (B)</p> Signup and view all the answers

Why is oxygen essential for animal respiration as mentioned in the text?

<p>Oxygen is required for cellular respiration in animals (B)</p> Signup and view all the answers

What is the role of chlorophyll in photosynthesis?

<p>Trapping sunlight to energize the food-making process (B)</p> Signup and view all the answers

Which part of the chloroplast is responsible for converting carbon dioxide into sugar?

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

How does sunlight act as a fuel for photosynthesis?

<p>By providing the plant with the energy it needs to make food (C)</p> Signup and view all the answers

What is the function of water in photosynthesis?

<p>Providing hydrogen for sugar production (D)</p> Signup and view all the answers

If chloroplasts were not present in plant cells, what crucial process would be disrupted?

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

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