Answer these questions concerning promoters.What is the common structure of a bacterial promoter with respect to consensus sequences?

Transcriptional regulation of operon gene expression involves the interaction of molecules with one another and of regulatory molecules with segments of DNA. In this context, define and give an example of each of the following:inducer

Transcriptional regulation of operon gene expression involves the interaction of molecules with one another and of regulatory molecules with segments of DNA. In this context, define and give an example of each of the following:repressor

Transcriptional regulation of operon gene expression involves the interaction of molecules with one another and of regulatory molecules with segments of DNA. In this context, define and give an example of each of the following:operator

Why is it essential that bacterial cells be able to regulate the expression of their genes? What are the energetic and evolutionary advantages of regulated gene expression? Is the expression of all bacterial genes subject to regulated expression? Compare and contrast the difference between regulated gene expression and constitutive gene expression.

Contrast positive versus negative control of gene expression.

Contrast the role of the repressor in an inducible system and in a repressible system.

For the lac genotypes shown in the following table, predict whether the structural genes (Z) are constitutive, permanently repressed, or inducible in the presence of lactose.Genotype Constitutive Repressed InducibleI⁺O⁺Z⁺ xI⁻O⁺Z⁺I⁻OᶜZ⁺I⁻OᶜZ⁺/F'O⁺I⁺OᶜZ⁺/F'O⁺IˢO⁺Z⁺IˢO⁺Z⁺/F'I⁺