BS has definitely been leaning more towards more comprehension and analysis. While there are certain things you should absolutely have committed to memory, a lot of the BS section involves dissecting graphs, tables, and making inferences when given scientific passages. I don't know how much time you have on your hands, but if you're not taking the mcat for a while, I would definitely look into reading scientific journals in nature, cell, PNAS, etc. Getting familiar with how scientific writing will definitely help out..