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

Movement into and out of cells — practice question

The diagram illustrates three pathways, X, Y and Z, by which substances may move across a cell surface membrane. Which option correctly indicates the pathways for vitamin D, which is fat soluble, and vitamin C, which is water soluble?

  • Avitamin D: Y, vitamin C: X
  • Bvitamin D: X, vitamin C: Y
  • Cvitamin D: X, vitamin C: Z
  • Dvitamin D: Z, vitamin C: Y

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