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.
For more information or clarification, you can review the AMCAS resources provided by the AAMC, or contact an AMCAS representative by email or by phone at (202) 828-0600, Monday through Friday 9:00 am to 7:00 pm ET. Please note they are closed Wednesday, 3-5 pm ET.