The graph above shows the progress of a chemical reaction. Based on the graph, which of the following is true?
Reaction A is enzyme-catalyzed, while reaction B is not enzyme-catalyzed.
Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed.
Reaction A uses cofactors, while reaction B does not use cofactors.
Reaction A and reaction B use cofactors.
