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

Movement into and out of cells — practice question

In what way do companion cells take part in loading sucrose into phloem sieve tube elements?

  • Aactively through cotransporter proteins and passively through plasmodesmata
  • Bactively through cotransporter proteins and plasmodesmata
  • Cpassively through cotransporter proteins only
  • Dactively through plasmodesmata only

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