1) there is almost no biochem taught and genetics is given throughout the curriculum. Unit A is very much focussed on public health, with some basic science thrown in.
2)exams are at the end of every Unit, with some units having a midterm and a final. R+e exams are cumulative exams that focus more on clinically relevant topics (i.e., No need to know the Krebs cycle for that exam but will have to what's the most likely diagnosis given x symptoms)
3)endo topis are integrated throughout and if I rremember correctly a lot was in the GI block.