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Question 35
What conditions enable RuBisCO to function as an oxygenase? Explain the ensuring process.


Solution

RuBisCo is an enzyme which has dual nature. It acts as carboxylase, when CO2 concentration is good enough in atmosphere. But if O2 concentration increases, its nature changes and it binds with O2 and acts as oxygenase enzyme, which forces CO2 to enter C2 cycle thus leading to photorespiration and loss of CO2.


Biology
NCERT Exemplar
Standard XI

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