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Cambridge IGCSE Biology practice

Paper 3 structured question: Anaerobic respiration

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Anaerobic respiration

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Paper 3Theory (Core)2 marks

Energy yield comparison

Description

Respiration types

Aerobic respiration fully breaks down glucose using oxygen, releasing a large amount of energy. Anaerobic respiration occurs without oxygen and releases much less energy from glucose.

  1. a

    Identify why anaerobic respiration produces less energy than aerobic respiration.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Anaerobic respiration

Paper 3Theory (Core)1 marks

Description

Energy from glucose

Cells can respire aerobically or anaerobically to release energy from glucose. Aerobic respiration uses oxygen and produces a large amount of energy. Anaerobic respiration does not use oxygen and produces less energy.

  1. a

    State which type of respiration produces significantly less energy from each glucose molecule.

    Aim for approximately 1 distinct marking point.

    [1]