FRANCIS LEROY & SEMPOT AMAURY, BIOCOSMOS / SCIENCE PHOTO LIBRARY FRANCIS LEROY & SEMPOT AMAURY, BIOCOSMOS / SCIENCE PHOTO LIBRARY
Glucose use in a plant, animation. In plants the sugar glucose (centre) is a product of photosynthesis, which occurs in the chloroplasts (red oval). The addition of nitrates and sulphates (left) to glucose leads to the synthesis of amino acids, the building blocks of proteins. Proteins have a number of roles in a cell, including being found in the cell membrane (bottom centre). Glucose that is not needed immediately can be stored as starch (top right). If it is to be transported around the plant glucose is converted to sucrose (centre right). Many glucose molecules may be linked to form cellulose (lower light), the main component of the plant cell wall. Other glucose molecules are used to synthesis oils.
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