Edexcel IGCSE Biology 2.18 Photosynthesis and Energy Conversion Questions

Practise explaining chlorophyll’s role in photosynthesis, the conversion of light energy to chemical energy, and how reduced photosynthesis can limit plant growth.

Exam points

Explain how chlorophyll in chloroplasts absorbs light energy for photosynthesis and converts it into chemical energy stored in glucose.
Explain how reduced photosynthesis lowers glucose production and can slow plant growth.

[Maximum number: 3]

Tobacco mosaic virus infects plant cells.
The photograph shows some of the virus particles.

Figure for Question Edexcel IGCSE Biology 2.18 Photosynthesis and Energy Conversion Questions question 1 — Edexcel IGCSE Biology

The photograph shows the leaves of a plant infected by tobacco mosaic virus.

Plants cells infected with the virus stop making chloroplasts.
Explain why plants that are infected with the virus grow more slowly than uninfected plants.

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Edexcel IGCSE Biology 2.18 Photosynthesis and Energy Conversion Questions question 1