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CAIE A-Level Biology 4.2.6 Water Movement Between Cells

Practise predicting osmosis down a water-potential gradient and explaining turgid, flaccid or plasmolysed plant cells alongside animal-cell swelling, lysis or crenation.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • predict net osmosis from higher water potential towards lower water potential
  • explain plant-cell turgor, flaccidity or plasmolysis through vacuole and membrane changes
  • contrast animal-cell crenation or lysis with plant cells supported by a cellulose wall

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