Suppose that you are studying an inducible operon that contains two genes required for the metabolism of compound xyz. Gene A encodes enzyme A, and gene B encodes enzyme B. When compound xyz is absent, the operon is repressed, but when compound xyz is present, the operon is induced. You have isolated four distinct mutants, numbered 1, 2, 3, and 4, which have the effects shown in the table below, where + indicates that the enzyme is synthesized and - indicates that the enzyme is not synthesized. Required:Identify the component of the operon that is mutated in each mutant. xyz absent xyz present Enzyme A Enzyme B Enzyme A Enzyme BWild Type - - + +Mutant 1 - - - +Mutant 2 + + + + Mutant 3 - - + - Mutant 4 - - - -