What is the primary function of the enzyme RuBisCO in the Calvin Cycle?
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Correct answer: Fixing atmospheric carbon dioxide onto RuBP
RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) catalyzes the first step of the Calvin Cycle, known as carbon fixation. It attaches CO2 to the five-carbon sugar RuBP, forming an unstable six-carbon intermediate.
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