Regular biochem would be better in the scenario where that class was the only determining factor for the MCAT. However, taking that class and getting an A will require so much more effort, most of which will not be relevant to the MCAT, vs self study combined with taking elementary biochem. Truthfully, most of the kids at my school get 30's and 40's in their gateway classes and have to be curved to get to a C. That said, it is unsurprising to me that those who took elementary biochem did poorly on that section of the MCAT; they clearly don't know how to study outside of showing up and looking at powerpoints. I don't have really have that problem (haven't finished a course with less than a 100% yet), so I'm not overly concerned about my ability to self-study any missing parts of the MCAT. I am more concerned about taking a class that eats up all my time and detracts from my ability to study for other portions of the test that I may discover are a weaknesses.