
GAL80 loss-of-function mutants express the GAL1, 2, 7, 10 genes constitutively in the absence of galactose)...
Answer all questions and explain in detail. 1) GAL80 loss-of-function mutants express GAL1, 2, 7, 10, genes constitutively (in the absence of galactose) because a transcriptional activation by GAL4 is not inhibited b GAL80 is not present to block GAL4 DNA-binding c GAL80 cannot respond to GAL3 signaling d A and B e B and C 2) Gal80-; GAL4- double mutants express the GAL1, 7, 10 genes a only In the presence of galactose b only in the absence of...
GAL4 null mutants express the GAL1, 2, 7 & 10 genes A. never whether galactose is absent or present B. constitutively whether galactose is absent or present C. only when galactose is present D. only when lactose is present E. only when galactose is absent 17 58
3. Assume presence of galactose and absence of glucose, and that mutants are loss of function. In a Gal 80 mutant, gal genes will/will not _________________ be expressed. In a gal4 mutant, gal genes will/will not ________________ be expressed. In a gal80/gal4 double mutant, the gal genes will/will not _________________ be expressed. If a scientist replaced the activation domain of gal4 with a histone deactylase domain, the gal genes will/will not ______________ be expressed.
The yeast Saccharomyces cerevisiae can grow as haploid or diploid cells. You have two haploid yeast strains that each carry recessive mutations that affect regulation of the genes required for galactose metabolism. One strain has a deletion of the region of the genome on chromosome II that lies between the GAL1 and GAL10 genes (deltaUAS). The other strain carries a mutant allele of the GAL80 gene on chromosome XIII that produces no functional GAL80 protein. Which of the following correctly...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
Question 10-12
10. During the mating process, yeast cells respond to pheromones secreted by other yeast cells. These pheromones bind GPCRs on the surface of the responding cell and lead to the activation of proteins inside the cell. When a wild-type yeast cell senses the pheromone, its physiology changes in preparation for mating: the cell stops growing until it finds a mating partner. If yeast cells do not undergo the appropriate response after sensing a pheromone, they are considered sterile....