In an enzymatic pathway, W, X, and Y are intermediates required to make product Z, and steps 1, 2, and 3 are enzyme-catalyzed steps that result in the production of Z: ZEAFXEM 123.
a. If an excess of product Z arises, identify which step of this pathway should be inhibited in the cell to maximize efficiency.
b. Describe how this system can be regulated by feedback inhibition. CUES: product, bind, allosteric, function, complementary.