Here is the link to all the 2nd and upper year courses you need/could to take for your degree.
http://registrar.mcmaster.ca /CALEN...nt/pg1957.html
As for med school, there have been a lot of threads on this but basically it varies from school to school, US and some Cdn school requires full year of bio, chem, orgo, physics, english, some will even consider biochem. While others don't have any course pre-req (e.g. most Ontario schools)