Exam 12: Gene Expression

The Gal4p protein can simultaneously regulate the five genes involved in galactose metabolism in Saccharomyces cerevisiae, despite binding to a specific 17-base pair upstream activator sequence (UAS), because

In eukaryotic genes

The transcription of a gene in-vitro is activated by protein A. This activation is repressed when protein B is present which is coded for on a different chromosome. Before protein B is added, protein A can be isolated from the reaction mixture, but when protein B is also present, only a much larger protein is able to be isolated. What is the explanation for this observation?

In eukaryotes, DNA binding domains specifically interact with which gene control regions?

RNA interference (RNAi) is a process whereby

Regulation of gene expression is essential to maintain cellular homeostasis. Control of gene expression may be achieved by

Which of the following is NOT a control point for gene expression

Which of the following statements about the function of the Dicer RNA endonuclease complex is INCORRECT?

In the lac operon of E. coli

Eukaryotic genes

A mutation occurs in the operator region of the lac operon of E. coli, and the repressor protein is unable to bind. Which of the following would occur?

Regulation of galactose-metabolising enzymes is achieved by

Regulation of the genes responsible for galactose metabolism in Saccharomyces cerevisiae

A regulatory cascade of gene expression is when

In the regulation of the lac operon in Escherichia coli, if both glucose and lactose were available energy sources for the cell, you would NOT expect that

DNA-binding regulatory proteins or transcription factors

If the operator region of the trp operon in Escherichia coli were moved to a different section of the chromosome, but was otherwise unchanged, the most likely result would be that

Some genes are expressed at constant levels (constitutive) whereas others are expressed at different levels in response to stimuli (differential). What kind of expression would you expect a gene to have if it were involved in the biosynthesis of actin, a component of the cytoskeleton?

A zinc finger DNA binding domain is

Regulation of gene expression