When I was 15 years old I got my first job at Burger King. This was the summer between my Sophomore and Junior year of high school. Literally the second day on the job, a woman and her three kids pulled up in the drive through. Still being naive and thinking everyone was a good person, I happily greeted them.
2 years ago. The difference between positive and negative control over transcription is that positive control promotes transcription and increases the frequency of initiation of transcription while negative control of transcription prevents the initiation of transcription and acts a repressor when glucose is present.
Positive scientific control groups are where the control group is expected to have a positive result, and allows the researcher to show that the set-up was capable of producing results. Generally, a researcher will use a positive control procedure, which is similar to the actual design with a factor that is known to work.