I'm only still thinking of applying to programs so it's not like I'm a nurse or anything, but I'd say it really is up to YOU. Would you feel better with a bachelor's in Cell Bio b/c honestly if you are doing the 4-yr program it really won't matter except for some of the classes might be easier for you, or you might not have to take some if they transfer over some of your science credits. I think it really is how you feel about it, it might be nice to have the bachelor degree in Cell Bio incase you find to don't like nursing, gives you something to fall back on. On the other hand if you think you're not doing well enough to get into nursing school next year than you might wanna jump on the train! lol Will you be trying to graduate with honours? ie: do an honours year (4th year). Because ( I dunno how it is for science, but I have a BAH in Classical Studies) but you could apply to graduate with just 3yr degree can you do that in science? Or is too rigid? In humanities subjects you can graduate after 3 years with a BA (as opposed to a BAH - the 4th year is your "honours" year and you are admitted based on your average, if you don't obtain the average then tough luck you don't get admitted to your honours year and don't get a BAH no matter if you've taken the same amount of courses as a person with a BAH). If you can get something for your 3 years of study you could do that, and that way you have at least something for your time and many universities have degree upgrade programs where you can upgrade to a full honours degree later on in life if you find it you want to.