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Science: Biology

4.1.1 Photosynthesis

Exam Board: AQA

Photosynthesis

 

Photosynthesis is an endothermic chemical reaction that occurs in chloroplasts in palisade cells in plants to produce glucose. It only happens in the day whilst light is available.

 

You need to know the following equations for photosynthesis:

  • Word Equation: Carbon dioxide + water glucose + oxygen (needs light)  

  • Chemical Equation: 6CO₂ + 6H₂OC₆H₁₂O₆ + 6O₂  

 

Memory Trick:  

1. Plants drink water → reactant  

2. We breathe oxygen → product  

3. We breathe out CO₂ → reactant  

4. Leftover = glucose (food)

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