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Mutation of Regulatory Genes

APBIO-K3GHZD

A scientist studying transcription in bacteria discovers a nonsense mutation in the regulatory gene of a repressible operon. The resulting protein products of the gene are non-functional.

In the bacteria with this mutation, the scientist observes

A

no transcription of the operon associated with the regulatory gene.

B

RNA polymerase enzymes with non-functional three-dimensional shapes.

C

continuous transcription of the operon associated with the regulatory gene.

D

ribosomes with non-functional small subunits.