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Moderate

Inducible Operons

APBIO-EWNBNN

Which of the following BEST describes an inducible operon?

A

The tryptophan gene, in which the presence of tryptophan functions as a corepressor to prevent its own transcription.

B

The lac gene, in which the repressor, preventing the synthesis of the enzymes that degrade lactose, is deactivated by the presence of lactose.

C

A type of gene expression mostly seen in eukaryotes.

D

All of the above.