Check your university's circulation/reference desk for practice tests. mine had 6 kaplan tests.
Ask a librarian about the ebooks your school offers. Mine has Cliffs DAT prep, which has 2 practice tests. AP Cliffs Biology, which has some practice tests that are comparable to the DAT bio section. A bunch of schaums outline books too. There is also a kaplan book with a practice test in it.
ADA has a practice test online
www.[B]ada[/B].org/prof/ed/
testing/
dat/
dat_
test_
sampleitems.pdf