O-LevelBiologyCell Biology5090/11 · May/June 2020 · Q31 Mark
A student takes a potato and cuts three pieces from it. Each piece is 5cm × 0.5 cm × 0.5 cm. He places the three potato pieces into three different concentrations of sugar solution. After two hours, he removes the potato pieces from the sugar solutions and measures their lengths. The results are shown in the table. solution length of potato piece after two hours/cm X 5.2 Y 4.7 Z 5.3 What can be concluded from these results?
ASolution Y has a lower water potential than the potato cells.
BSolution Z has the lowest water potential.
CThe potato piece in solution X increases in length because it takes up sugar.
DThe potato piece in solution Y decreases in length because it loses sugar.
✓ Correct answer
A: Solution Y has a lower water potential than the potato cells.
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