Well, the organic chemistry you have taken should cover the full range of topics on the test. I don't know how your college divide up orgo, but i know most colleges have organic chemistry taught in two semesters with maybe a separate lab course if it is not offered with the core organic class. You do not need more advanced classes than what is required in the premed/predent curriculum. Get the kaplan review book and look through it to see whether you have learned all the topics covered.
Definitely would have taken Anatomy & Physiology or Human Gross Anatomy had I known to. I thought I would have scored better on the Biology section if I had taken one of these classes.
I agree with the General. Take physiology if you can. Anatomy isn't a bad idea either, but you can score well without it. Also, if possible, take a zoology course. There are a handful of zoology questions on the exam.