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What will be the binding status of regulatory proteins in lac operon when concentrations of both lactose and glucose are very low in the culture medium?

  1. Only the repressor remains bound to the operator
  2. Only the cyclic AMP-Catabolic Activator Protein (cAMP-CAP) complex remains bound to the CAP binding site
  3. Neither the repressor nor cAMP-CAP complex remain bound to their respective binding sites
  4. Both the repressor and cAMP-CAP complex remain bound to their respective binding sites
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