Half of our lectures included drawing out structures and talking about basic chemical reactions that happened with every step. I think anywhere from 10-20% of our test questions required that you memorize the structure before you have any shot at answering the question. I can tell you so far in second year, almost no part of biochemistry has been useful in understanding pathology, pharmacology, microbiology or clinically relevant scenarios (whereas anatomy, genetics, physiology, histology, immunology, cell biology, neuroanatomy all have been pretty relevent). There were a few things with vitamin deficiency and cholesterol pathways but those were a very small part of what we were taught in biochemistry.
