Learning objective

Outline the functions of enzymes: (a) amylase converts starch into simple sugars, (b) proteases break down proteins into amino acids, (c) lipase decomposes fats and oils into fatty acids and glycerol.

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Exam focus

Cambridge IGCSE Combined ScienceHuman nutritionSupplement content

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Quick explanation

This point belongs to Digestion, especially Digestion outcomes.
You need to be able to outline the functions of enzymes: (a) amylase converts starch into simple sugars, (b) proteases break down proteins into amino acids, (c) lipase decomposes fats and oils into fatty acids and glycerol.
The key ideas to know are Describe.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Describe

Why it matters

This objective helps connect Digestion outcomes to exam-style questions, flashcards, and revision notes for Digestion.

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Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 4Theory (Extended)3 marks

Description

Enzymes are biological catalysts that speed up chemical reactions in the body. They are essential for breaking down food into absorbable nutrients.

a
Outline the functions of amylase, protease, and lipase in digestion.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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