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Cambridge IGCSE Biology practice

Why does a plant cell not burst when placed in pure water?

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MCQ

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cambridge_mcq

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Topic

Osmosis

Exam-style question

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Why does a plant cell not burst when placed in pure water?.

  1. A.Because of the cell membrane
  2. B.Because of the cell wall
  3. C.Because of plasmolysis
  4. D.Because it loses water

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Paper 4 structured question: Osmosis

Paper 4Theory (Extended)2 marks

Description

Plant Cells in Sugar Solutions

The student places plant cells in three different sugar solutions: pure water (0% sugar), 5% sugar solution, and 20% sugar solution. After 30 minutes, the student observes the cells under a microscope and notes their condition.

SolutionCell Condition
0% sugarTurgid
5% sugarNormal
20% sugarPlasmolysed
  1. a

    Explain why the plant cells become turgid in pure water.

    Aim for approximately 2 distinct marking points.

    [2]