Biology 9700 · AS & A Level · Movement into and out of cells

Movement into and out of cells — practice question

Several processes are involved in the loading of sucrose into companion cells. Which one is active?

  • Athe movement of hydrogen ions into the cytoplasm of companion cells
  • Bthe movement of hydrogen ions out of the cytoplasm of companion cells
  • Cthe movement of sucrose into companion cells
  • Dthe movement of sucrose out of companion cells

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