Cambridge IGCSE Biology practice

Paper 3 structured question: Anaerobic respiration

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Paper

Marks

Topic

Anaerobic respiration

Exam-style question

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Paper 3Theory (Core)1 marks

Cells sometimes need to produce energy when oxygen is not available.

Description

When oxygen is absent, cells use anaerobic respiration to generate energy by decomposing nutrient molecules.

a
State why cells perform anaerobic respiration.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Description

Cells can break down nutrient molecules to release energy without using oxygen through anaerobic respiration.

a
Describe anaerobic respiration.
Your answer
Aim for approximately 2 distinct marking points.
[2]