Exam 14: Gene Regulation

Leucine zipper proteins regulate transcription by:

In the lac operon, cAMP binds to:

Gene expression in bacteria is regulated primarily by:

In female mammals, most of the inactive X chromosome becomes:

In the tryptophan operon, the repressor actively binds to the operator when:

The leucine zipper has a unique structure compared to the other transcription factors because it is a dimer.

Describe two ways in which posttranscriptional gene regulation occurs in eukaryotes.

Proteolytic processing of eukaryotic proteins involves:

DNA sequences called ____ increase the rate of RNA synthesis after initiation of transcription.

Under high tryptophan conditions, tryptophan binds to and activates the repressor protein, thereby blocking transcription of the trp operon. This is an example of:

The function of the catabolite activator protein (CAP) is to:

The gene that codes for the repressor protein of the E. coli lac operon is constitutive; therefore, the lac operon is typically:

Explain the respective advantages associated with operons being inducible (e.g., the lactose operon) or repressible (e.g., the tryptophan operon).

Repressible genes typically regulate gene expression of enzymes involved in anabolic pathways.

Genes in euchromatic regions are:

Bacterial enzymes that are part of a rarely used catabolic pathway are usually organized into a(n) __________.

If a mutated region on chromosome 15 is inherited from the father, the child will have Prader-Willi syndrome; however, if the same mutated region is inherited from the mother, the child will have Angelman syndrome. This is an example of:

Considering that virtually all cells in any given individual contain the same genetic information, how is it possible to have different cell types with unique functions?