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

Movement into and out of cells — practice question

Plant cells were kept for 50 minutes in three sugar solutions: 10%, 5% and 1%. At the start of the experiment, the water potential in the cytoplasm of the three cells was the same. The diagrams show what the cells looked like after 50 minutes, as seen with a light microscope. Which conclusion is correct?

  • ACell P has the same concentration of sugar inside and outside the cell.
  • BCell Q is flaccid and cell P is plasmolysed.
  • CCell Q was placed in the 1% solution.
  • DThe sugar solution outside cell R has a less negative water potential than inside cell R.

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