Should I take upper bio classes for the MCAT? I have read many threads that said genetics, physiology and cell biology helped tremendously on the MCAT. But I have also read that you only need the pre-reqs. I'm a little bit confused. I don't mind taking those classes if it would increase my chances of getting a higher MCAT score but if the benefits are not really that substantial, I would rather take humanities classes and other classes I wouldn't be able to take in med school. Any suggestions?