If you're shooting a university's graduation, then odds are that most of the people in attendance are from out of town and plan to leave soon. In addition to the camera, tripod and flash, you should also have a great photo printer so that you can deliver the goods on the same day.
Polymerase chain reaction. Polymerase chain reaction, (PCR), a technique used to make numerous copies of a specific segment of DNA quickly and accurately.
Transcription is the process by which an RNA polymerase uses DNA as a template to make RNA. This produces a single stranded product that spans only a tiny fraction of an entire DNA molecule. Also, RNA polymerases are slightly more error-prone than DNA polymerases.