You forgot that they also individually call each of your LOR writers and EC supervisors as well as all previous professors, employers, and high school teachers and, finally, your school's premed advisor. Each of these people is asked a series of questions about your potential as a medical doctor with an auditory lie detector in use (in case your writers feel bad telling "the truth" about you). They will also receive add'l reports on your MCAT score (including subscores for each topic of chemistry, bio, o-chem, and physics) so they know what kinds of science questions to throw your way during the interview. No biggie, though, your ochem class is one in a million. If you take the regular one, you just need to be sure you take calc-based physics (honors) and both analytic and physical chemistry for the gchem req.