7. Differential (Alternative) RNA processing A. Cu vs Cô (IgM vs IgD) B. Membranous Ig vs Secretory Ig 1

43. What type of genetic alteration allows p53 to promote cell growth? A. Translocation B .Methylation of CpG islands C. Point mutation D. Frameshift mutation E. Wobble pairing

3. Figure 2 illustrates how Pitx1 transcription is regulated in different tissues. The center image is that of a stickleback embryo. The drawings in the surrounding boxes show the Pitx1 gene region and activator proteins present in the jaw, pelvis, eye, or pituitary tissues. a. List all the tissues shown in Figure 2 that express the Pitx1 gene. b. If a fish does not produce activator 1 proteins because of a mutation in the gene that encodes those proteins, Pitx1 will be expressed in which of the following tissues? c. If a fish does not produce activator 3 proteins, Pitx1 will be expressed in which of the following tissues? d. A fish inherits a mutation in the Pitx1 coding region. This is a nonsense mutation that introduces a premature stop codon, resulting in a nonfunctional protein. Where would you expect Pitx1 to be expressed in this scenario?

1. Briefly explain how the TRP operon can control the production of tryptophan. please don't make it too long but make sure to gave all the important stuff. Make sure your answer is in detailed. Thank you