Highly agree...not taking orgo II is asking for it on the MCAT.
Plus, I'm taking biochemistry now (post-orgo II and the MCAT), and even though they don't require you to know the mechanisms, it really makes a lot more sense if you do. Unless your school is very different from mine, understanding things like enolate formation, aldol reactions, amides, etc., are all involved in biochem and I didn't learn them till orgo II.