So in 2014 I did all of my BIO classes online at NVCC and it was fairly easy. I think I did them in full semester online courses but I may have done them 6/6 over the summer or 8/8 in the fall. Anyway, you just have to do the normal reading and do some at home labs and submit pictures (plant growing, DNA extraction from a banana, etc). At the time they had the same course numbers as the regular BIO classes. Although it was never a problem for me, I can't imagine anyone having a problem with online courses right now. I also did physics online because I needed to boost my grade (physics for engineers at my school was taught so poorly that the physics department briefly lost accreditation over it). Super easy.
Biochem and BIO aren't really related because most of bio is most macro (evolution, plants, taxonomy, etc.) and biochem is micro. I think NVCC requires you have at least one semester of OChem and take OChem II concurrently with Biochem if you haven't already taken it. Biochem is one class that is super important in med school, so don't sleep on it. I'd also recommend genetics if you can find a good professor. Will definitely help on the MCAT.