Water Potential · Paper 1 — Free Biology HL Practice Questions

A plant cell is placed in a sucrose solution and becomes flaccid but does not plasmolyse. Which statement best explains this observation?

A plant cell has a water potential of $-0.6$ MPa and is placed in a solution with a water potential of $-0.3$ MPa. Which of the following correctly describes the direction of net water movement and its effect on the cell's pressure potential?

A potometer is used to measure the rate of water uptake by a leafy shoot. An air bubble in the capillary tube moves $12 \text{ mm}$ in $5$ minutes. The capillary tube has a cross-sectional area of $0.5 \text{ mm}^2$. What is the rate of water uptake by the shoot?