Students who are interested in fields between the intersection between biology and chemistry can be very well served by completing a major in Biochemistry, Chemistry or Biological Sciences.  Students completing any of these majors regularly enter graduate programs in biochemistry, cellular or molecular biology, complete medical school, work in biotech or other industries, teach, or pursue other careers.  Your choice of majors should primarily stem from which major includes the courses you are the most interested in taking at Wellesley.  If you are unsure which major is right for you, the best advice is to begin taking relevant courses in both biology and chemistry for the first year or two, allowing you to further explore your curricular interests.  If you find that you want to keep taking significant upper-level courses in both disciplines, then the interdepartmental major in Biochemistry is likely a good fit for you.  However, if you’d rather focus your upper-level coursework on either chemistry or biology, then the departmental majors in Chemistry or Biological Sciences may fit better with your interests.  It’s also worth noting that some students interested in studying biological systems on the molecular level do so through other majors, such as neuroscience or computer science, complemented by coursework in biology and chemistry.