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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Osmosis

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Osmosis

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Paper 3Theory (Core)4 marks

The effects of different solutions on cells are important in biology.

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Effects of Solutions on Cells

Cells can be placed in isotonic, hypertonic, or hypotonic solutions, each affecting their size and function differently.

  1. a

    Compare the effects of hypertonic and hypotonic solutions on animal cells.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Osmosis

Paper 3Theory (Core)3 marks

Description

Osmosis in Cells

Osmosis is the movement of water through a semi-permeable membrane from an area of higher concentration to an area of lower concentration. This process is vital for maintaining cell structure and function.

  1. a

    Explain the process of osmosis and its importance to cells.

    Aim for approximately 3 distinct marking points.

    [3]