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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Enzymes

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Enzymes

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Paper 4Theory (Extended)4 marks

The activity of enzymes is crucial for metabolic processes.

Description

Enzyme Activity and pH

Enzymes operate best at specific pH levels. Extreme pH levels can lead to denaturation.

  1. a

    Discuss the impact of pH on enzyme activity and the implications for biological processes.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Enzymes

Paper 4Theory (Extended)3 marks

Description

Effect of pH on Enzymes

Enzymes have specific pH ranges where they function optimally. Deviations from this range can lead to changes in enzyme shape and activity.

  1. a

    Explain how changes in pH can affect enzyme activity.

    Aim for approximately 3 distinct marking points.

    [3]