Additional Biology - How plants produce food

AQA Additional Biology

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  • Created by: Jade
  • Created on: 14-05-11 16:08


Carbon Dioxide + Water --> glucose + oxygen

Photosynthesis takes place in the chlorophyll in the chloroplasts. 

During photosynthesis light energy is absorbed by the chlorophyll in the chloroplasts. it is used to convert CO2 and H20 into sugar (glucose). Oxygen is released as a by-product. 

Leaves are well adapted to allow maximum photosynthesis to take place. 

Limiting factors; Carbon Dioxide, Light, Temperature

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How plants use glucose

Respiration - break down the glucose using oxygen to provide energy for the cells.

Transport and storage - soluble glucose produced is converted into insoluble starch for storage. 

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Why do plants need minerals?

Plant roots absorb mineral salts. 

Nitrates - needed for growth 

Magnesium - needed to make chlorophyll 

If mineral ions are deficient, a plant develops symptoms because it cannot grow properly 

Nitrates - Stunted growth

Magnesium - yellow leaves

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