The lac operon is induced by the presence of lactose, but it is transcribed at a high rate only when:
A) The cyclic adenosine monophosphate (cAMP) level in the cell is high.
B) A ribosome binds to the Shine-Dalgarno sequence.
C) A ribosome binds to the 5' cap of the mRNA.
D) Tryptophan is present in high concentration.
E) Glucose is present
Correct Answer:
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