Photosynthesis of Plants and Bacteria

Photosynthesis is a photochemical process by which green plants, sea weeds, algae and certain bacteria adsorb solar energy and utilize it to convert the atmospheric carbon dioxide to carbohydrates in the presence of water. The overall reaction for all cases except for photosynthetic bacteria may be written as  

Photosynthetic process occurs on a large scale, fixing more than 2 X 10 tons of carbon from atmospheric CO2 as carbohydrates per annum. 

Photosynthetic process occurs in two stages, namely light reactions and dark 

Dark reactions The short-term chemical energy from hght reactions is utilized for reduction of carbon dioxide into glucose in the absence of hght [4]. 

Dark reactions do not imply that these reactions take place in the dark. It imphes that these reactions occur without hght but take place simultaneously with hght reactions in daytime. 

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