The graph presents three activation energy profiles for a chemical reaction (the hydrolysis of sucrose): an uncatalyzed reaction, and the same reaction catalyzed by two different enzymes. As the reaction progresses, energy rises and reaches the activation energy, then decreases to a value lower than in initial state. The activation energy for the uncatalyzed reaction is the greatest, for the reaction catalyzed by enzyme A it is lower, and the activation energy for the reaction catalyzed by enzyme B is the lowest.
Rank these by reaction rate, as measured by the rate of product formation per unit time, from lowest reaction rate to highest reaction rate. To rank items as equivalent, overlap them.
(From lowest to highest) Uncatalyzed Reaction, Reaction catalyzed by enzyme A, Reaction catalyzed by enzyme B