So there are two GRE exams that are very similar - biochemistry+cell biology and biology. Do a lot of biology students take those 2 exams? And what do grad schools think of that? (also, do a lot of them also consider taking the GRE chemistry exam too?) From the initial looks of it, it seems that the biochemistry+cell biology exam is more abstract and difficult than the regular GRE biology exam (which doesn't even look that much deeper than AP Biology).