IB Biology HL 2.4.4 Osmosis experiment design and data Question Bank
Practise IB Biology HL 2.4.4 by designing and evaluating experiments that estimate solute concentration in plant cells.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Identify controls and variables needed for a reliable osmosis experiment.
- Analyse mass-change data to estimate solute concentration and evaluate reliability.
D2.3.4—Changes in plant tissue question 1
Data was collected on rabbit red blood cells that were exposed to sodium chloride (NaCl) and scorpion venom. Under some osmotic conditions red blood cells swell and burst, releasing hemoglobin (hemolysis). The graph shows the response of red blood cells to different concentrations of sodium chloride, with and without scorpion venom.
Describe how the variables would be controlled in an experiment to estimate the osmolarity of plant tissue.
All question bank results loaded