Edexcel IGCSE Biology 2.19 Photosynthesis Equations Questions

Practise writing and completing the photosynthesis equation, including correct formulae, balancing and distinguishing symbol from word equations.

Exam points

Complete the balanced symbol equation for photosynthesis with 6CO2 + 6H2O → C6H12O6 + 6O2.
Give the photosynthesis equation in symbols; a correct unbalanced equation may earn partial credit, but a word equation is not accepted where symbols are required.

[Maximum number: 2]

The diagram shows a single-celled organism called Chlorella that lives in fresh water. Chlorella has a chloroplast and can photosynthesise.

Complete the balanced chemical symbol equation for photosynthesis.
...... +...... ⟶ ...... $+6 \mathrm{O}_{2}$

- one mark for $6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}$ (on

LHS)

Accept $6 \mathrm{H}_{2} \mathrm{O}$ $+6 \mathrm{CO}_{2}$

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