Cambridge IGCSE Biology practice

Paper 3 structured question: Physical digestion

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Paper

Marks

Topic

Physical digestion

Exam-style question

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Paper 3Theory (Core)1 marks

Physical digestion and chemical digestion are two stages in the digestive process.

Description

Physical digestion involves breaking down food into smaller pieces to increase its surface area.

a
State how physical digestion helps enzymes during chemical digestion.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Description

Physical digestion breaks food into smaller pieces without changing its chemical structure, increasing surface area for enzymes.

a
Identify one reason why increasing the surface area of food helps chemical digestion.
Your answer
Aim for approximately 2 distinct marking points.
[2]