rubisco can use ____ or co2 as a substrate
RuBisCO During carbon fixation, the substrate molecules for RuBisCO are ribulose-1,5-bisphosphate and carbon dioxide (distinct from the "activating" carbon dioxide).[11] RuBisCO also catalyses a reaction between ribulose-1,5-bisphosphate and molecular oxygen (O 2) instead of carbon dioxide (CO2).