In a theoretical operon, genes A, B, C, and D represent the repressor gene, the promoter sequence, the operator gene, and the structural gene, but not necessarily in the order named. This operon is concerned with the metabolism of a theoretical molecule (tm). From the data provided in the accompanying table, first decide whether the operon is inducible or repressible. Then assign A, B, C, and D to the four parts of the operon. Explain your rationale.(AE=activeenzyme;IE=inactiveenzyme;NE=noenzyme.)Genotype tm Present tm AbsentA⁺B⁺C⁺D⁺ AE NEA⁻B⁺C⁺D⁺ AE AEA⁺B⁻C⁺D⁺ NE NEA⁺B⁺C⁻D⁺ IE NEA⁺B⁺C⁺D⁻ AE AEA⁻B⁺C⁺D⁺/F'A⁺B⁺C⁺D⁺ AE AEA⁺B⁻C⁺D⁺/F'A⁺B⁺C⁺D⁺ AE NEA⁺B⁺C⁻D⁺/F'A⁺B⁺C⁺D⁺ AE+IE NEA⁺B⁺C⁺D⁻/F'A⁺B⁺C⁺D⁺ AE NE
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