Photosynthesis is an endothermic reaction because it uses solar energy to build glucose molecules. Rubisco, an enzyme found in plants, is critical to this process. How does the presence of rubisco affect the change in free energy consumed or produced by the reactants and products?

The presence of rubisco increases the free energy produced by the reactants, but the free energy consumed by glucose stays constant.
The presence of rubisco increases the free energy consumed by glucose, but maintains the free energy produced by the initial reactants.
The presence of rubisco decreases the energy required for activation in the transition state and increases the free energy consumed by glucose.
The presence of rubisco decreases the energy required for activation in the transition state, but the change in the free energy of the reactants and products remains constant.