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

Movement into and out of cells — practice question

A student first measured the mass of a potato cylinder and then placed it into a test-tube filled with salt solution. After one hour, the potato cylinder was taken out of the salt solution. It was dried with blotting paper and weighed again. The student noted that the potato had a lower mass. Which row gives the correct explanation of the results the student obtained?

  • Awater potential before soaking: higher; condition after soaking: plasmolysed
  • Bwater potential before soaking: higher; condition after soaking: turgid
  • Cwater potential before soaking: lower; condition after soaking: plasmolysed
  • Dwater potential before soaking: lower; condition after soaking: turgid

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