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Suppose An Operon Has The Following Characteristics

: (1) The operon codes for structural proteins that convert compound Q to compound B. (2) The operon is controlled by a constitutively expressed regulatory gene called reg. (3) In wild-type individuals, the operon is transcribed in the absence of compound B but not in the presence of compound B. (4) In reg- mutants, the operon is constitutively transcribed. Is this operon inducible or repressible? Why? A-It is repressible because wild-type transcription is repressed in the presence of compound B. B-It cannot be determined because the number of structural genes is unknown. C-It is inducible because the operator in reg- mutants can still bind to compound B. D-It is inducible because wild-type transcription does not occur in the presence of compound B. E-It is repressible because reg- transcription only occurs in the presence of compound B.
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