<p>Why not take AP Chem junior year and AP Bio senior year? Thats what I did.</p>
<p>If you don’t want to do that, review some basic chemistry this summer. Learn about how molecules are drawn and represented with a formula. Go over bonding. Learn about diffusion.</p>
<p>Its just a few basic concepts of chemistry that you need to understand. You could probably get away with not knowing any chemistry and still getting a 5.</p>