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.
During peak periods from June to September it will take approximately 6 weeks for AMCAS to process your application. The earliest you can submit is June 3rd, the earliest it can be sent to medical schools is June 27th. The deadline for early decision programs is August 1st.