Answer:
The correct answer is ribulose bisphosphate carboxylase/oxygenase or RuBisCo.
Step-by-step explanation:
the enzyme ribulose bisphosphate carboxylase/oxygenase or rubisco is probably the most abundant enzyme on the earth. It is also considered as the most important enzyme as it functions as a bridge by producing organic carbon which is glucose from the inorganic carbon dioxide available in the air.
This enzyme is most abundant and most important because of every carbon dioxide have to react with it. So, the production of 5 carbon compound could be possible as this compound provides energy to all living beings that it is important for cellular activities.
Thus, the correct answer is ribulose bisphosphate carboxylase/oxygenase or rubisco.