The Five-Step Mechanism of Ribulose Bisphosphate Carboxylase (Rubisco)

question 26

Multiple Choice

The five-step mechanism of ribulose bisphosphate carboxylase (rubisco)

• A) is an overall thermodynamically unstable reaction.
• B) involves C₁, C₃, C₄, C₅, and C₆ molecules in the enzyme mechanism intermediates.
• C) adds a CO₂ molecule to a C₅ ribulose sugar, yielding an unstable C₆ molecule that cleaves into two C₃ molecules.
• D) involves the incorporation of 3 CO₂ molecules to yield one 3-phosphoglycerate molecule.

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