Phloem Translocation Quiz

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Questions and Answers

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

  • Translocation
  • Phloem loading (correct)
  • Long distance transport
  • Symplastic phloem loading

In apoplastic phloem loading, how are photoassimilates first transported from the mesophyll cells?

  • Through plasmodesmata
  • By diffusion through the cell membrane
  • Directly into the sieve tubes
  • Via the bundle sheath cells to the extracellular apoplastic region (correct)

What are the specialized companion cells called in symplastic phloem loading?

  • Bundle sheath cells
  • Sieve elements
  • Intermediary cells (correct)
  • Transfer cells

What is the process called when transfer from sieve elements into the target cells at the sink end occurs?

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

What is the name of the pathway through which phloem loading and unloading occurs involving active transport into the specialized companion cells called transfer cells?

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

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