Why 12 molecule of H2 O …
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Gaurav Seth 7 years ago
The net reaction of photosynthesis is
6CO2 + 12H2O → C6H12O6 + 6H2O + 6O2
--From this reaction, it is clear that to form one molecule of glucose, six molecules of carbon dioxide are required.
-- To answer why 12 molecules of water are required, here is the explanation.
--Products of light reaction required in dark reactions to form one molecule of glucose are 12 molecules of NADPH and 18 molecules of ATP.
-- For forming 2 molecules of NADPH from NADP+ , 2 molecules of water are required so that demand of 4 electrons and protons can be satisfied.
--Two molecules of water split to form1 molecule of oxygen and the respective number of electrons and hydrogen ions are also formed .
--Now for producing 12 molecules of NADPH , total 12 molecules of water are required.
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