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.
Negative control. no result, no color change. -by mixing up another solution that contains everything except the target molecule, you are exposing the indicator to the same conditions minus one variable. -if only the specific molecule causes a color change, this test should give you no reaction.