Adcom's :: Human Physiology, Microbiology, Anatomy, Biochemistry, Genetics, Histology, Cell and Molecular Biology
The first five are the fat 5's of UOP from what I've known. In comparing two competitive applications, if they can't decide (I got this info from dental club meetings) they'd look into the upper division classes that the students have taken. You might want to include other classes if you can like Medical Sociology or Psychology, Accounting, etc...
Based on some students who are already in dental school taking Biochemistry, Histology and even Neurobiology helped them when they're in dental school.
Better DAT:: Physiology, Microbiology, Ecology, Evolution, Biochemistry, Genetics, Quantitative Analysis, Physical Chemistry, Advance Organic Chemistry, Drafting Class (If you can find one take this, this is good for PAT), Math Classes even basics take it for review before DAT especially I would retake College Algebra to refresh my word problems and probably trigonometry. Philosophy makes you use to reading stuff.