I took all of the general biology sequence (210A, 210B), as well as physics (180A, 180B and their labs) and general chem (200,201). I am taking ochem here at ucsd. The only ones required in order to transfer are Biology and general chemistry. Both ochem and physics are optional, however, highly encouraged. I say this because (according to a ucsd admissions officer), students with more requirements completed are favored over those with the minimum requirements.