Racheeta, how could you say nobody studies bchem and you should be fine with just any letter. That is naively stupid. Every grad school looks for certain standards in their students and personal essay os one of them. I am sure schools would rather have no grad students than having one with high school standard. So, rg DO NOT listen to Racheeta and give your full effort to the essay. AND THERE ARE ENOUGH PEOPLE IN THE WORLD WHO STUDY BIOCHEMISTRY so that almost all big Universities have a separate department for it. Just because you dont study does not mean others dont study Racheeta.