The GAL gene system in yeast is used to metabolize galactose. In the prese galactose, the GAL genes are expressed; however, in the absence of galactose, the GAL genes are repressed. A yeast mutant is discovered that continuously expresses the GAL genes in the presence or absence of galactose. Which one of the following mutations is likely the cause of constitutively expressed GAL genes? deletion of GAL4 deletion of the UAS elements in the regulatory regions of GAL genes deletion of GAL3 deletion of GAL80

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.