As another poster said, unless you majored in chem it's unlikely that a science major helped you much. It's not as though anyone comes out of a bio degree having memorized their genbio textbook, after all. I'm a great bio student, but since anatomy wasn't a bio major class in my school (it's a nursing class), and we skimped on plant and eco/enviro stuff in my genbio class (and I never took them as electives, because I prefer molecular), I don't know half the bio on the DAT.
It goes like that.