Cambridge IGCSE Biology practice

Paper 3 structured question: Anaerobic respiration

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Topic

Anaerobic respiration

Exam-style question

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Paper 3Theory (Core)2 marks

Anaerobic respiration is a process cells use to generate energy without oxygen.

Description

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

a
Describe anaerobic respiration.
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[2]

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Paper 3Theory (Core)1 marks

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]