Your assistant Igor is studying a neurotransmitter-stimulated GPCR pathway, hypothesized to stimulate the expression of genes that increase retention of memory. He plans to test his hypothesis using a cell line expressing this GPCR. If his hypothesis is correct, what would be the expected outcome on memory gene expression? Explain you reasoning for each answer. d. a mutation in the nuclear import sequence of PKA from PPKKKRKV to PPAAAAAV e. deletion of a functional phosphatase for the gene regulatory protein