Question: Enzymes are typically needed to catalyze reactions that would be very unlikely to occur on their own. Imagine that the activation energy, Ea, for the uncatalyzed cheese reaction at 20C is 18kcal/mol. This reaction could then be catalyzed by colloidial platinum Ea= 13kcal/mol or by the enzyme renin Ea=7kcal/mol. Draw an activation energy diagram for this reaction under catalyzed and uncatalyzed conditions, and explain what means for the activation energy to be lowered from 18 to 13 kcal/mol by platinum, but from 18 to 7kcal/mol with rennin.