Question: A marine microorganism contains an enzyme that hydrolyzes glucose-6-sulfate (s). The assay is based on the rate of glucose formation. The enzyme in a cell-free extract has kinetic constants of Km = 6.7 x 10^-4 M and Vmax = 300 n moles x liter^-1 x min ^-1. Galactose-6-sulfate is a competitive inhibit.