Medical scientists usually need a doctorate degree in biological science. Some medical scientists have medical degrees. Medical scientists typically complete courses in biology, chemistry, physics, engineering, mathematics, and computer science.
Status: Medical Student (Accepted) AMCAS states that it usually takes ~4-6 weeks for verification to go through, but looking at the verification trend right now here: http://forums.studentdoctor.net/threads/2014-2015-verification-thread.1076112/ I would say you're looking at 3-4 weeks from the time of submission.
Early MCAT (by May 1) You should take the MCAT by May 1 so you can get your scores back by June 1 at the latest, which is about the first day you can submit your AMCAS medical school application. The exact date may vary each year, but should be sometime in the first week of June.