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C4 plants Have evolved a technique involving PEP carboxylase to work around the photorespiration done by...

C4 plants Have evolved a technique involving PEP carboxylase to work around the photorespiration done by Rubisco. These two genes are very closely related. What is the likely mechanism by which both came to exist in the same organism?
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Answer)In photorespiration pathway,Calvin cycle RUBISCO reacts with oxygen.

In C4 plants photorespiration process is minimum by differentiating carbon dioxide fixation and Calvin cycle. The molecular mechanism varies a little, and in case of gene regulation,small subunit of RUBISCO and phytochromes induces high rate of transcription,thereby the genetic controlled end points are same. This genes contributes and they exist in same organism.

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