For CSU, their pre-requisite requirements are minimal compared to other schools - they only require genetics, stat, biochem, physics, and english. Basically the rest are "electives", but 12 credits have to be humanities/arts/social sciences. Most schools specifically require biology, chemistry, organic chemistry, etc. but CSU will basically count all those courses as electives. If you have added CSU on VMCAS, you'll see when you're assigning classes to the pre-requisites that you'll have a ton of classes left over that you can add toward the 30 credits of "electives". It sounds scary but it's definitely not. You'll be fine!