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Question: 1d which of the following statements about the ubiquitination of...

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1D Which of the following statements about the ubiquitination of proteins are true? ) Ubiquitin is a relatively small protein that is widely expressed in eukaryotic cells. 2) It is covalently attached to target proteins in an ATP-dependent reaction. 3) A carboxyl group of ubiquitin forms amide bonds with free amines found on the target protein. 4) Target selection is determined by ubiquitin-protein ligases A) Only statements 1, 2, and 3 are correct. B) Only statements 1, 2, and 4 are correct. C) Only statements 2, 3, and 4 are correct. D) All of the listed statements are correct E) None of the listed statements are correct 12) A researcher will do which of the following to elucidate how a known receptor mediated, polar protein molecule signals through the cell ultimately changing transcription of genes. Pick the best choice. A) Clone one of the affected genes promoter into a luciferase vector to study transcription of that gene. B) Run a transcriptome array to determine all the changes in every gene level in treated vs untreated cells. C) Use a similar xenobiotic to see if they can reproduce the same results. D) Over-express a GFP tagged version of the receptor protein. E) Perform a western blot comparing phosphorylated and unphosporylated versions of a potential kinase target of the receptor molecule.
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