CAIE IGCSE Biology 3.2.3 Osmosis Into & Out of Cells

Practise identifying osmosis as water movement through cell membranes, then predict whether plant or animal cells gain or lose water in a stated surrounding solution.

Exam points

identify osmosis as the process moving water molecules into root hair cells
explain net water movement across the cell membrane using the direction of the water-potential gradient
predict whether a plant or animal cell gains or loses water in a stated surrounding solution

[Maximum number: 1]

Fig. 5.1 is a diagram of a plant root hair cell.
Key
× nitrate ion
- water molecule

Fig. 5.1

State the name of the process that moves water molecules into root hair cells.

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3.2.3—Osmosis through cell membranes question 1