GCSE Biology (WJEC)

Topic Summaries

Photosynthesis and respiration

Photosynthesis

  • Photosynthesis is an endothermic reaction where light energy from the environment is transferred into the chloroplasts.
  • Chlorophyll is the green pigment in chloroplasts, which absorb light energy for photosynthesis.
  • Photosynthesis is carried out by the plant to produce glucose, which has many uses including plant respiration.
  • Word equation: carbon dioxide + water \(\overset{\text{light}}{\longrightarrow}\) glucose + oxygen
  • Symbol equation: \(\text{C}_6 \text{H}_{12}\text{O}_6\overset{\text{light}}{\longrightarrow} 6\text{CO}_2 + 6\text{H}_2\text{O} \)

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