I would definitely recommend that you go for the BSN, mainly because you already have a bachelor's degree, and it's even in biology. With a BS in Biology, I believe you may have already completed the required biology classes for a BSN (for example - General Bio, Anatomy and Phys.1 & 2, Microbiology...). You may have even taken some chemistry, which is usually needed in BSN programs. You have completed general education courses as well. There may be a couple of courses you did not take through your BS in Biology (for example, Nutrition), but my guess is that you can probably concentrate mainly on the actually nursing courses if you go back to school for a BSN. Now, one benefit of getting an ADN is that it is usually a less expensive route since credits at a university/college tend to cost more than those at a 2-year institute such as community college. On that note, you would become a registered nurse while paying less. On the other hand, there are universities with considerably low tuition rates, as well as those that offer accelerated BSN programs if you already have a bachelor's degree in a different field. So, with all this said, you can decide which route is best for you. I recommend the BSN only because you have a BS in Biology which would knock out some of the courses you will have to take for your BSN. But if finances are a concern, community colleges can also provide very good RN programs that will prepare you to be a competent registered nurse. Hope that helps