I took MCAT yesterday, and it became clear that it is simply not enough to take Intro Bio and Gen Chem, Physics, math classes. They cover about 3/4 of all the concepts in PS and BS. For the rest of the questions you really need to take more classes. I decided to compile a list of additional classes that people sugest to take before MCAT. So here is goes: 1) Biochemistry (Conceptual and applied) 2) Genetics 3) Analytical chemistry I have taken all of these classes. But still, some of the Genetics questions on the MCAT were killing me. If you have any other classes that you think would be useful, please add them into the list.