Wikipedia's featured article today (2/12) concerns DNA. Don't blame me, I'm just the messenger (I will not devulge the trope represented by that remark). I might digressively comment that Zyprexa, a common antipsychotic medication, puts mRNA on a merry-go-round at the communication juncture twixt nerve and fat such that the brain cannot accurately register internal BMI. Patients taking Zyprexa add 30% of body weight, on average, during first year of Tx. Centrifuge their blood, and it looks like a parfait of RBC and lard. Diabetes is a serious side effect. It is preferable to the alternatives, however. Internal data being collected for analysis as we speak concerning local med issues. Consequently, major class actions developing with Eli Lilly. But don't let such things distract you from your exam, on which, I wish you good luck. Just wanted to put a context on the importance of knowing about mRNA and the rest of the genetic gang, right down to the molecular bonds that, in my minds eye, resemble static shocks when touching metal in an alpine community while wearing nylon and scuffing feet on a wool carpet during the dry winter season. Again, good luck on the exam.