Cambridge IGCSE Biology practice

Paper 3 structured question: Chemical digestion

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Paper

Marks

Topic

Chemical digestion

Exam-style question

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Paper 3Theory (Core)2 marks

Chemical digestion is an important process in the human digestive system.

Description

Chemical digestion breaks down large insoluble molecules into smaller soluble molecules that can be absorbed by the body.

a
Describe what happens during chemical digestion.
Your answer
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[2]

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Paper 3Theory (Core)1 marks

Description

Large molecules like starch and proteins cannot be absorbed directly by the body because they are insoluble.

a
Identify why large molecules must be broken down during digestion.
Your answer
Aim for approximately 1 distinct marking point.
[1]