Cell signaling in eukaryotes is often dependent on receptor proteins located in the plasma membrane. During
the production of the mature mRNA molecules coding for these receptors, pre-mRNA molecules are processed
to remove introns and to connect exons together. The exons contain the sequences that code for proteins. In
certain instances, different mature mRNA molecules can be formed from the same pre-mRNA by alternative
splicing, which results in different protein sequences in the resulting polypeptides. Figure 1 represents the
expression of a gene with 5 exons that can be alternatively spliced to produce receptor protein A and receptor
protein B.
(a) Explain how ligand A and ligand B can cause identical cellular responses in a cell.
(b) Predict the most likely effect of a two-nucleotide deletion in the middle of the intron located between exons
4 and 5 on the structure of protein A. Justify your prediction.

Summarize deleon's advice to the strikers

B. speculate about one positive way and one negative way that this boundary has affected the geographical units it separates over time.

In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).