As a pre-med student (a few years back), biological science was my major. I became interested in biological science while working in a small radiology department in a little Podunk town, I developed an appreciation for the human body and just how complex yet simple it is. My advice to you is to tour a radiologist's office and look at x-rays and also a morgue. Watch a lot of TruTV, i.e. Forensic Files, etc. That may peak your interest in biology. I guest when it comes down to it, the interest is either inside you or it isn't.