<p>I'm an international student, who is required to get at least 12 credits per semester. Since I'm not going to graduate early and I will most likely to get over 40 credits transferred from AP scores, I only have to get the least number of classes (12 credits) each semester. I want to concentrate on research of biology, so I think it's probably wise not to take too many classes, especially ones unrelated to biology. I'm going to do neither double-major nor minor. </p>
<p>However, have many competitive applicants in grad school admission taken many classes even they don't need to get so much excess credits? How many classes are recommended to be taken in my case? Is it meaningful for a single major student (like me) to get 150 credits just because I can get? </p>