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Water Potential · Paper 1 — Free Biology SL Practice Questions

1FoundationMCQConcept of water potential in plants1 markPaper 1~2 min

A plant cell has a solute potential of

-0.8 \text{ MPa}

and a pressure potential of

+0.3 \text{ MPa}

. The cell is placed in a solution with a water potential of

-0.4 \text{ MPa}

. What is the initial direction of net water movement, and why?

Solutions

2MasteryMCQImportance in plant hydration and transport1 markPaper 1~2 min

A 10 cm segment of potato tissue is placed in a

0.5\ \text{mol dm}^{-3}

sucrose solution for 30 minutes, after which it has become flaccid. The segment is then transferred to pure water. Which statement correctly explains the net movement of water into the potato cells after transfer?

Solutions

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