Chemistry - Photosynthesis
During photosynthesis,  consistent with other endothermic reactions,
 low-energy reactants (CO2, H2O) are converted into high-energy
products, particularly the carbohydrate glucose, C6H12O6.
Glucose molecules in plants are converted into the two most common complex
carbohydrates, and via the process of condensation polymerisation,
represented by the general equation
Most plants contain 60-95 per cent carbohydrate on a dry mass basis.
Plants convert some of the carbohydrate into vegetable oils (fats) and
So directly or indirectly, all the organic food of plants and animals
Carbohydrates may be classified as monosaccharides,  disaccharides 
or polysaccharides,  according to the number of simple sugar
(saccharide) units present.
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