I’d say definitely take after ochem 1 (dont think ochem 2 really applies much) but from personal experience, I really was grateful that I took biochem during the semester I was studying for the MCAT. Made everything much more fresh in my mind since the MCAT is incredibly biochem heavy and memorizing everything again can eat away at study time.
As far as physics goes, unless your physics is calculus based i don’t see why there’s a need to take it at the same time vs another semester. If calculus will be used in your physics class (i know it wasn’t for me) it is best to take it before.