Phloem Translocation Quiz
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Questions and Answers

What is the process called when photoassimilates are transferred into sieve element and companion cells at the source end?

  • Phloem loading (correct)
  • Apoplastic loading
  • Long distance transport
  • Symplastic loading
  • How are photoassimilates translocated into the sieve tubes in symplastic phloem loading?

  • Via the extracellular apoplastic region
  • Through specialized companion cells by plasmodesmata (correct)
  • By active transport into the specialized companion cells
  • From the mesophyll cells to the bundle sheath cells
  • What is the process called when photoassimilates are transferred from sieve elements into the target cells at the sink end?

  • Long distance transport
  • Unloading (correct)
  • Symplastic loading
  • Apoplastic loading
  • In apoplastic phloem loading, where are photoassimilates first transported from the mesophyll cells?

    <p>Bundle sheath cells</p> Signup and view all the answers

    What are the specialized companion cells called in apoplastic phloem loading where photoassimilates are actively transported into?

    <p>Transfer cells</p> Signup and view all the answers

    What is the process of transferring photoassimilates into sieve element and companion cells at the source end called?

    <p>Phloem loading</p> Signup and view all the answers

    How are photoassimilates translocated into the sieve tubes in symplastic phloem loading?

    <p>Through specialized companion cells by plasmodesmata</p> Signup and view all the answers

    What is the process of transferring photoassimilates from the sieve elements into the target cells at the sink end called?

    <p>Unloading</p> Signup and view all the answers

    In which type of phloem loading are photoassimilates first transported from the mesophyll cells via the bundle sheath cells to the extracellular apoplastic region?

    <p>Apoplastic phloem loading</p> Signup and view all the answers

    What are the specialized companion cells called in apoplastic phloem loading where photoassimilates are actively transported into?

    <p>Transfer cells</p> Signup and view all the answers

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