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IB Biology SL B2.1.5 Osmosis and Aquaporins Questions

Predict passive water movement across partially permeable membranes from solute or water-potential differences, then explain how aquaporins increase the rate in IB Biology SL B2.1.5.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Define osmosis as passive net movement of water across a partially permeable membrane from lower solute concentration or higher water potential toward higher solute concentration.
  • Use solute or water-potential differences to predict the direction and net amount of water movement until equilibrium.
  • Explain that aquaporin protein pores increase membrane permeability and the rate of water movement by osmosis.

IB Biology SL B2.1.5 Osmosis and Aquaporins Questions question 1

[Maximum number: 2]

Describe the movement of water across membranes.

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