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

Movement into and out of cells — practice question

Which statement correctly describes the function of co-transporter proteins in sucrose movement?

  • ACo-transporter proteins pump hydrogen ions into phloem sieve tubes along with sucrose.
  • BHydrogen ions diffuse through co-transporter proteins with sucrose into companion cells.
  • CPlasmodesmata move sucrose into phloem sieve tubes via co-transporter proteins.
  • DSucrose is moved through co-transporter proteins by active transport.

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