For your first practice test, that is nothing to be concerned about. In bio, a little but of studying will take you a long way - you will likely see your scores increase dramatically if you work hard. The real thing is not as bad as those practice tests from kaplan, and some of those questions are too eccentric. Stick to the basics of the kaplan review book, read over some old notes, and for a thorough review of biology questions I would recommend Destroyer. Using those sources, you should be just fine. Good luck!!