<p>Bio and Chem are not easy and chem is generally the harder of the two. Math 1C is usually easier than 2C but 2C has the better curve -- thus if you have taken through pre-calc, it is often better to take 2C. Also, if you are not sure where you are applying then 2C is better simply because, among those colleges that require SAT II's, some either require or highly recommend 2C, and some, like all UC's, will not even accept 1C. Thus, taking Math 2C means you will have one SAT II that will be accepted at all schools which require SAT II's.</p>
<p>Yeah, they're an hour long each and you can take up to 3 in each sitting. If you feel ready and that you know the material, take as many as possible.</p>