How long do i have to got to go to nursing school if I already have a B.S. in Pre-health biology?

I agree with the former poster. Your best bet is to find a program that takes people with a BS & places them into an accelerated program. There are even programs where you can go from a BS to an MSN, w/o getting a BSN first. But I have to say (and you aren't gonna like this,but I'm gonna say it anyhow), that with the nursing shortage & how competative it is to get into a nursing program, I would really hate to see a slot in a nursing program go to someone who is only using it as a jumping off point towards another career. If you aren't able to find an accelerated program for someone w/ a degree, you can probably expect it to take at least 3 years. Seems like it takes most people 5 years to get through a BSN program. You will have about 2 years of your actual nursing content. Some of your courses will count towards your pre-reqs, but there will almost certainly take at least one or two semesters to take other pre-reqs that were not a part of your rpior curriculum.

Nursing school is going to be another 2 to 2 1/2 years of your life at minimum, unless you get into an accelerated RN program. Are you sure you can't find a PA school that will let you in with your current major (assuming you have good grades)? You might be able to find an accelerated RN/BSN program. Those usually take about one year, and they are so intense that you will not be able to have a job while you're in the program. So that's one option. Don't tell the admissions people you are taking the course as a stepping stone to a P.A. or they won't admit you--they are trying to train nurses, not P.A.s. Any regular academic BSN program is going to require you to complete all the pre-requisites for their program, and all the coursework for the BSN/RN, which, as I said, will take a couple years. They are sticklers for these things. Get your admissions information directly from somebody who does admissions for a P.A. program. Then you'll know for sure. Schedule a visit, take your transcripts, and have a chat. I see no reason why you should get a superfluous degree if you can avoid it. Education is an expensive and precious commodity.