IMO, take the AP classes/tests. I used AP Bio (placed out of Bio 101 and 102), AP Physics (1 course), AP Computer programming (a credit is a credit), AP Calc BC (placed out of Calc 1 and 2)... that was almost an entire year worth of courses (my undergrad, Lafayette College, every course was 1 credit [said to be equivalent to 4 credit hours], you took 4 credits a semester, and needed 32 credits to graduate, so by bringing in 6 credits via AP exams was money... my senior year was a cakewalk)
Med Schools require 6 credits of Biology (if not more nowadays... I'm about 8 years out from applying to med school so things may have changed), but not required to be Bio 101 and 102 (as a Bio major I had no issue there)
Med Schools require 6 credits of Physics, so I took physics 2 and biophysics
Med Schools require some amount of Math, so I took Statistics and Game Theory (yup, counted game theory as math requirement).
General Chemistry is a bit tougher unless you end up being a chem/biochem major. Most people won't take inorganic chemistry.... and whether a Biochemistry course would count for your gen chemistry requirement may be debatable (I'm pretty sure they aren't going to be like, oh, this guy got an A in Biochem I and II, but AP'd out of gen chem, so he doesn't meet the requirements for admission and so we are going to have to pass on him
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