IB Biology HL · 2025
4.6 Water potential
14 past paper questions from 10 papers across 4 exam sessions. See what repeats, then practise the same skills with AI marking.
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HL archive · 2025 to 2026
4.6 Water potential
Latest exam session: May 2026
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Micro-topics in 4.6 Water potential
In syllabus order. The ring is the share of papers each appears in. 4 of them have no matching questions in this archive.
4.6.1
Solvation with water as the solvent
No question tagged to this topic in the 18 Biology HL papers analysed
No matches in this archiveRevise it4.6.2
Water movement from less concentrated to more concentrated solutions
No question tagged to this topic in the 18 Biology HL papers analysed
No matches in this archiveRevise it4.6.3
Water movement by osmosis into or out of cells
No question tagged to this topic in the 18 Biology HL papers analysed
No matches in this archiveRevise it4.6.4
4 questions · in 11% of papers
Occasionallast May 26 P2 TZ1
- Regular
last May 26 P1 TZ3
4.6.6
Effects of water movement on cells with a cell wall
No question tagged to this topic in the 18 Biology HL papers analysed
No matches in this archiveRevise it4.6.10
Contributions of solute potential and pressure potential to the water potential of cells with walls
7 questions · in 33% of papers
Frequently testedlast May 26 P2 TZ3
Exam pattern
How often each micro-topic has been examined, year by year. Each label is explained under the grid.
Does it repeat?
Questions per year for each micro-topic, including those with no matches in this archive.
fewermore
| Micro-topic | 2025 | 2026 |
|---|---|---|
| 4Contributions of solute potential and pressure potential to the water potential of cells with walls, 2025: 4 questions | 3Contributions of solute potential and pressure potential to the water potential of cells with walls, 2026: 3 questions | |
| 2Effects of water movement on cells that lack a cell wall, 2025: 2 questions | 1Effects of water movement on cells that lack a cell wall, 2026: 1 question | |
| 3Changes due to water movement in plant tissue bathed in hypotonic and those bathed in hypertonic solutions, 2025: 3 questions | 1Changes due to water movement in plant tissue bathed in hypotonic and those bathed in hypertonic solutions, 2026: 1 question | |
| ·Water movement from less concentrated to more concentrated solutions, 2025: 0 questions | ·Water movement from less concentrated to more concentrated solutions, 2026: 0 questions | |
| ·Effects of water movement on cells with a cell wall, 2025: 0 questions | ·Effects of water movement on cells with a cell wall, 2026: 0 questions | |
| ·Solvation with water as the solvent, 2025: 0 questions | ·Solvation with water as the solvent, 2026: 0 questions | |
| ·Water movement by osmosis into or out of cells, 2025: 0 questions | ·Water movement by osmosis into or out of cells, 2026: 0 questions |
- Frequently testedin at least a quarter of all papers, and still appearing in the last two years
- Regularin roughly one paper in six or more
- Occasionalin about one paper in ten
- No matches in this archiveon the syllabus, but has no question tagged to it in this archive. This does not mean it has never been examined
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Questions on 4.6 Water potential, by exam session
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Frequently asked questions
Short answers about this page.
Which Biology HL exam sessions are covered for 4.6 Water potential?
4 exam sessions from 2025 to 2026, the latest May 2026. Every Paper 1 and 2 in every timezone is read and classified in full, which gives 10 papers in this archive.
Which 4.6 Water potential topic comes up most?
Contributions of solute potential and pressure potential to the water potential of cells with walls (4.6.10): in 33% of papers, last seen May 26 P2 TZ3. Usually "Explain / Identify", worth about 2 marks in a paper that includes it.
Can I see the original question and mark scheme?
No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.
What do "banker", "due" and "rising" mean?
Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.
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