Refer to the Figure Below

Short Answer

Refer to the figure below. Portions of three biosynthetic pathways regulated through feedback inhibition and activation are shown.Two of these pathways intersect at carbamoyl phosphate.The third pathway generates a product that activates production of carbamoyl phosphate through allosteric modification of the enzyme carbamoyl phosphate synthetase.In this set of pathways, arginine biosynthesis is shut down through feedback inhibition when _______ and arginine reach high levels of concentration.