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D2.3.6—Effects on cells with wall

Cells with walls become turgid in hypotonic solutions and plasmolysed in hypertonic solutions as water moves by osmosis across membranes.

Syllabus
First assessment 2025
Objective
D2.3.6
Level
SL

Exam analysis

Chance of appearing1%of analysed past papers
Latest appearanceMay 2025
Most common paperPaper2
Typical marks7

Common command terms

  • Outline
  • State
  • Explain

Scoring notes

Common mistake
Saying plant cells burst in hypotonic solution ignores the protective cell wall.

Recent exam appearances

May 2025Paper2 ["SL"] · TZ16(c)[ 7 ]D2.3.6—Effects on cells with wall
Practice this objective

Coverage 2025–2025 · Updated 16 Jul 2026

Concept essentials

  • Water entry can make plant cells turgid.
  • The cell wall prevents plant cells from bursting under turgor pressure.
  • Hypertonic solutions cause water loss and plasmolysis.
  • Plasmolysis involves the membrane pulling away from the cell wall.
ConceptIB Biology SL