3. The phosphorylation of glycerol is a necessary step in forming the phospholipids that comprise cell membranes. A glycerol + HPO4 2-  glycerol-3-phosphate + H2O ∆G° = +9.2 kJ a. Is this reaction spontaneous or non-spontaneous? How do you know? The reaction converting glycerol to glycerol-3-phosphate can be coupled with the conversion of ATP to ADP: B ATP + H2O -> ADP + HPO4 2- + H+ ∆G° = -30.5 kJ b. Under standard conditions, is this reaction spontaneous or non-spontaneous? c. Write one single equation to show the net result of coupling reactions A and B by adding the two reactions together. d. Hence what is the delta G of the coupled reaction under standard conditions? Is it spontaneous?