Page 9 - phytochemistry I - PharmD Clinical

electromagnetic energy into chemical potential.
- Other class consists of the enzymatic reactions that utilize the energy from the

light reaction to fix carbon dioxide into sugar. These are referred to as the dark
reactions this can be summarized as follows:

2 H 2O + CO2 + light chlorophyII→ (CH 2O) + H 2O + O2

 Through the above-mentioned photosynthetic process various monosaccharides
are produced, via phosphorylated sugars e.g. Glucose-6-phosphate and fructose-
6-phosphate. The latter monosaccharide phosphates are then utilized by the plant
cell either as energy or as a building unit to give disaccharides and
polysaccharides ... etc.

Configuration:
 The open chain structures of sugars was proposed by Fisher in 1880's,

while in 1926 Howarth proposed the cyclic structure (pyranose and furanose
rings).

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