biology gcse

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limiting factors the rate of photosynthesis can be affected by three main factors light intensity temperature carbon dioxide concentration light the more bright / plentiful the light, the higher the rate of photosynthesis. In low light photosynthesis stops temperature temp. affects all chemical reactions as temperature rises so does the rate of photosynthesis until the enzymes that control photosynthesis denature, at 40 50 ˚C carbon dioxide concentration CO 2 is used in photosynthesis in order to produce glucose + oxygen (and energy). it is also produced by the plant when respiring, CO 2 levels tend to rise at night as the plant does not photosynthesise. It is used up in the morning when the sun is up

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rates affecting photosynthesis

Transcript of biology gcse

Page 1: biology gcse

limiting factors   the rate of photosynthesis can be affected by three main factors 

­ light intensity ­ temperature  ­ carbon dioxide concentration 

 light  the more bright / plentiful the light, the higher the rate of photosynthesis. In low light photosynthesis stops  

  temperature  temp. affects all chemical reactions as temperature rises so does the rate of photosynthesis until the enzymes that control photosynthesis denature, at 40 ­ 50 ˚C  

  carbon dioxide concentration CO2 is used in photosynthesis in order to produce glucose + oxygen (and energy). it is also produced by the plant when respiring, CO2 levels tend to rise at night as the plant does not photosynthesise. It is used up in the morning when the sun is up