Which of the following mechanisms is used to coordinate the expression of multiple, related genes in eukaryotic cells?
A) A specific combination of control elements in each gene's enhancer coordinates the simultaneous activation of the genes.
B) The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time.
C) The genes are organized into large operons, allowing them to be transcribed as a single unit.
D) A single repressor is able to turn off several related genes.
E) Environmental signals enter the cell and bind directly to promoters.
Correct Answer:
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