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Get Answers to all your Questions
4. is an enzyme that acts both as a carboxylase and oxygenase. Why do you think
carries out more carboxylation in
plants?
Answers (1)
RuBisCO functions as oxygenase only when there is a higher concentration of oxygen and a lower concentration of carbon dioxide. Both these conditions are not found in bundle sheath cells of C4 plants. These do not have a photolytic evolution of oxygen. They receive a regular supply of carbon dioxide even when the stomata are closed. Therefore, RuBisCO of C4 plants functions only as a carboxylase and not as oxygenase.
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