IB Biology SL B2.1.5 Osmosis and Aquaporins Questions
Practise interpreting osmosis in plant and cell contexts, then use frog-egg data to compare water uptake with and without aquaporins.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Define osmosis as passive net water movement across a partially permeable membrane from low to high solute concentration.
- Predict water movement in soil-to-root and frog-egg contexts from solute or water-potential differences.
- Compare aquaporin and control frog-egg graphs to explain faster water uptake, cell swelling and bursting.
IB Biology SL B2.1.5 Osmosis and Aquaporins Questions question 1
[Maximum number: 2]
Describe the movement of water across membranes.
osmosis / moves passively;
from regions of low solute/high water potential/concentration to high solute concentration / low water potential/concentration;
passes through protein channels/aquaporins/selectively-permeable membrane;
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