Cambridge IGCSE Combined Science practice

Paper 4 structured question: Photosynthesis

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Photosynthesis

Exam-style question

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Paper 4Theory (Extended)4 marks

Photosynthesis is a vital process for life on Earth.

Description

Photosynthesis occurs in green plants, algae, and some bacteria. It converts light energy into chemical energy stored in glucose.

a
Describe the process of photosynthesis and its importance to life on Earth.
Your answer
Aim for approximately 4 distinct marking points.
[4]

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Paper 4Theory (Extended)2 marks

Description

The equation for photosynthesis is: 6CO2 + 6H2O → C6H12O6 + 6O2.

a
Explain the significance of the balanced equation for photosynthesis.
Your answer
Aim for approximately 2 distinct marking points.
[2]