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Bacteria adjust their physiology to match environmental conditions by coordinately regulating gene expression in response to environmental cues.

Fill in the blanks below to describe the different categories of gene expression observed in bacteria.

Genes whose products are necessary for basic metabolic activities are generally expressed at constant levels, called
Select Option repressibleinducibleconstitutive
expression. Genes whose products function in the degradation of specific nutrient sources are generally only expressed when the nutrient is present and show
Select Option repressibleinducibleconstitutive
expression. Genes whose products function in the biosynthesis of cellular components are often expressed unless the component is present in excess and show
Select Option repressibleinducibleconstitutive
expression.
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