The Gal4 protein plays a regulatory role in regulation of the galactose metabolism in yeast. Which of the following statements is FALSE? Question 3 options: It binds to promoter region under all conditions. It recruits mediator under all conditions. It recruits mediator only in presence of galactose. I recruits mediator only when it is associated with SAGA.
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Gal4 is a transcription factor that regulates the expression of genes involved in galactose metabolism. It binds to specific DNA sequences in the promoter region of these genes. Show more…
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Although operons are not common in eukaryotes, eukaryotic genes may be activated by the same stimulus. Which of the following DNA regulatory sequence makes this coordinated gene expression possible? Core promoter Enhancer element Response element Boundary element Silencer element QUESTION 18 A mutation in the gene for the yeast regulatory protein GAL4 causes yeast to grow poorly on galactose. What is the function of GAL4? It is a substrate that binds and activates a transcriptional activator. It is a product that binds and activates a transcriptional repressor. It is a transcription activator for the galactose-digesting enzyme gene. It is a transcription repressor that prevents expression of yeast galactose-digesting enzymes. It is an enzyme that metabolizes galactose.
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Which of the following statements is accurate regarding the yeast GAL gene regulation? A) The structural genes GAL1, GAL7, and GAL10 are regulated as a polycistronic transcription unit. B) The GAL4 regulatory protein does not bind to the UAS element in the presence of galactose. C) The GAL4 regulatory protein is a repressor. D) The regulation of the GAL1 gene is repressible. E) None of these
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Match each genetic component involved with GAL gene regulation in yeast with the best description of its function. Enhancer element upstream of gal genes Transcription factor with a DNA binding domain and trans-activation domain Protein that interacts with GAL4 when no galactose is present Protein that senses the presence of galactose DNA binding protein that leads to repression of transcription in response to glucose
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