1.

 Which of the following events would occur at the E. coli lac operon when the glucose concentration of the growth medium is low and the lactose concentration is high?

A. The lac repressor protein will bind to the operator sequence.
B. Ribosomes will stall during translation of the first 13 amino acids.
C. The transcribed RNA will form a cAMP-dependent stem-loop structure to terminate transcription.
D. The catabolite gene activator protein (CAP), bound with cAMP, will stimulate binding of RNA polymerase to the promoter.
Answer» E.


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