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Davide U

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  1. Hello there, my questions are the following. If we agree that PEP carboxylase is more efficient than RuBisCO since it can't bind Oxygen, why isn't it present in C3 plants as well? Is it just a question of evolution and C3 plants are just "worse" with regards to efficiency, or is there any usefulness in having an enzyme like RuBisCO instead? (RuBisCO is present in C4 plants as well, right?) Second question: PEP carboxylase doesn't bind Oxygen. In C4 plants, we have bundle sheeth cells that don't have grana. Why isn't it a good idea to let the Calvin cycle unfold in "normal" cells that
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