Photo respiration and its affects
Photorespiration and its affects Photorespiration is defined as the process in which oxygen combineswith ribulose biphosphate (RuBP) in the presence of sunlight and CO, isproduced. The process is called photorespiration because in the presence oflight (photo), oxygen is taken up and CO2 is evolved (respiration). Photosynthesis needs optimum concentration of the requirementsfor normal functioning. If however one of the requirement is present in lessconcentration than the optimum, the process of photosynthesis is affected and slows down. In the Dark reaction of photosynthesis, normally CO, combines with RuBP (carboxylation) forming PGA molecules. The process occurs in thepresence of an enzyme called ribulose biphosphate carboxylase (rubisco). This enzyme can act both as carboxylase and oxygenase. The reactiondepends on the concentration of CO, and 0, If the concentration of CO, ismore, then rubisco combines with CO, and photosynthesis proceedsnormally. On the other hand if ...
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