Genetic Regulation Prokaryotes
In the presence of tryptophan in the cell, the repressor is __________

bound to neither tryptophan nor DNA
bound to tryptophan
bound to DNA
bound to both DNA and tryptophan

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Genetic Regulation Prokaryotes
Why are several structural genes regulated as a unit in bacteria?

An accident of evolution
None of these
The bacteria chromosome is so small; many different genes must be controlled by the same promoter
It allows coordinating regulation of genes with a common function

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