1. Suuuuper fun. I'm still in second so I don't think I've experienced all the pros of it yet, but in general I'd say I'm really happy being in the Biochem program.
Workwise, it's more intense than first year, but hey, what program isn't more intense in second year? There are a lot of courses that I wish they never made us take (chem bio), but aside from that, I really like the concepts they teach us in the Biochem courses, Microbio bio courses and especially the inquiry lab course
Labs on the schedule may tell you it's 4 hours long, but so far, I've only spent 2 hours in that lab max. Felicia (the supervisor for that course) is extremely nice and the experiments she designed for us really introduced me to being in a biochemical setting.
2. Yeahhh, Physics 1B03 is a toughie. You won't have to take it in first year, but by the end of second year, you'll have to have taken this course. Most programs (Bio I think) also make you take it. There's no hope escaping this course. Good luck! The course itself was okay; if you understand the concepts in and out and think logically, you'll be able to do well. Chem bio in second year on the other hand.... was a bunch of useless equations.