MaxPlanker, I can't back out of the research now because I have committed to the program already. The research hours are usually pretty flexible though. I feel like I have a solid grounding on everything but bio and biochem; I was always under the impression that other people waited to take several upper-level bio/biochem courses before taking the MCAT.
Also, I thought that biochem was heavily tested on the new MCAT, though I'm not sure how specific it gets (I did read through the AAMC exam content review, but idk how much detail is tested on each topic).
Cotterpin, that's a possible idea but that gives me ~6 weeks of devoted study time as opposed to the 3 months I have now. Granted, I'm doing research now but this is at a very different pace than taking classes, participating in extracurricular activities, etc. I have a lot more downtime that I can use to study.