So from what I see here, if you're applying to Life Science in the fall, then you will not have to take 1b03 physics!
The minimum that you have to take although, is Physics 1L03 which is not as hard as 1b03 (I took both, and my 1b03 mark is much lower than my 1l03 mark).
All in all, just finish life sci, and you can get into the PNB program given that your GPA is 9.5+ once you're done first year!
If you have any questions, feel free to PM me!
Best of luck.
says thanks to Juliann for this post.