In a key reaction of glycolysis, dihydroxyacetone phosphate (DHAP) is isomerized into glyceraldehyde 3-phosphate (G3P) by the action of the enzyme triose phosphate isomerase:
DHAP <--------> G3P ΔG = +7.5 kj/mol


Because ΔG°’ is positive, the equilibrium lies to the left. (a) Calculate the equilibrium constant for this reaction, assuming a temperature of 37 °C. (b) In the cell, depletion of G3P makes the reaction proceed. What is the value of ΔG if the concentration of G3P is kept at 1/100 of the value of the concentration of DHAP?