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Cambridge IGCSE Biology practice

Paper 4 structured question: Osmosis

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4

Paper

3

Marks

Topic

Osmosis

Exam-style question

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Paper 4Theory (Extended)3 marks

Organisms must regulate water absorption and loss to survive in different environments.

Description

Water Balance in Organisms

An animal cell is placed in a solution with a different water potential than the cell cytoplasm.

  1. a

    Explain the significance of osmosis in how the animal cell absorbs or loses water.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: Osmosis

Paper 4Theory (Extended)3 marks

Description

Water Movement in Cells

A plant cell is placed in a solution with a different water potential than the cell sap.

  1. a

    Explain how water potential affects the movement of water into or out of the plant cell.

    Aim for approximately 3 distinct marking points.

    [3]