Biology · May / June 2020 · Paper 11 · Question 3

A student takes a potato and cuts three pieces from it. Each piece is 5 cm × 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?

1. ASolution Y has a lower water potential than the potato cells.
2. BSolution Z has the lowest water potential.
3. CThe potato piece in solution X increases in length because it takes up sugar.
4. DThe potato piece in solution Y decreases in length because it loses sugar.

As printed in the paper