A biochemist determines reaction rate using varying substrate concentrations and one unit of Taq polymerase at 72oC. The following data are obtained. Which of the following is true when the reaction rate is 5 fmol/min?
A. There are significantly more substrate molecules than free enzymes.
B. There is twice the number of substrate molecules compared to free enzymes.
C. There are approximately equal numbers of substrate molecules and free enzymes.
D. There is an excess of free enzymes, compared to substrate molecules.