Wow, out of stater w/ an interview at iowa, you must have very good stats.
(not exactly word for word, but you get the idea)
Why medicine?
What would you do if your friend was addicted to drugs/alcohol?
Describe a time you showed compassion?
(not sure if this was one of the five)
What will make you a good physician?
Sorry, I cant remember the last two. For the 5 questions, the interviewers cannot give you any feedback, but they may refer back to it when you finish the questions. The sdn interview feedback on iowa is pretty good. Also, you may have to wait a bit for your interview.
Basically the day is just intro, lunch, interviews from 1-3pm or so. Your interview will be ~25 min long. All in all, a pretty relaxed interview.
Good luck!