Question 3 5 pts Assume you have purchased a peptide named Excellin as a possible wonder drug. The people who have studied it in the past have proven by experiment that Excellin in aqueous solution will not migrate in an electric field when the pH of the solution is equal to 10.2. Choose which of the following statements are true about Excellin. The isoelectric point (pl) of Excellin is 10.2 The isoelectric point of Excellin is 1/2 X 10.2 5.1 At pH 7, Excellin will bind to a cation exchange column At pH 7, Excellin will bind to an anion exchange column. At pH 2, the predominant form of Excellin is more positively charged than its predominant form at pH 12. The information about lack of migration in an electric field at pH 10.2 tells us that Excellin is a highly hydrophobic molecule