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The development of global regulatory systems in prokaryotes

  • A.determines the exact location of the cell on the globe
  • B.aids in DNA replication
  • C.determines the exact location of the replication site
  • D.regulates many genes under varying environmental conditions

Answer: D

Correct answer: regulates many genes under varying environmental conditions

A global regulatory system - a regulon or stimulon - controls many genes at once in response to a single condition: heat shock, starvation, oxygen. Coordinating a whole set of responses through one signal is far more efficient than regulating each gene separately.

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