Does the DAT go very in-depth into molecular genetics? I just read over and took notes on the molecular genetics chapter of fer-alis' notes and I feel like I don't know half of what he's talking about. My test is scheduled September 10th...should I be stressed about this? Should I cover every minute detail or should I just understand the big concepts? I know the big processes, but it's the PCR methods and bulky stuff at the end of the chapter I'm not familiar with.