When a bacterial cell is present in an environment where both lactose and glucose are present, the glucose will be metabolized f
irst and the lactose will be used when the stores of glucose have been depleted. How does a bacterial cell recognize the fact that glucose is present and turn off transcription of the lac genes even when lactose is present?(A) A CAP-cAMP complex is required for transcription, and its level is low when glucose is present.(B) The CAP binding site is activated.(C) Glucose is a repressor molecule.(D) The lac promoter binds glucose and shuts down the lac operon.
Lac operon system in bacteria explains the lactose metabolism in the cell. The first operon system was discovered by Jacob and Monod. Operon may be defined as the cluster of genes that are transcribed as a single RNA unit.
The bacteria uses glucose if glucose and lactose are present in the media. The bacterial cell can recognize the glucose presence as CAP-cAMP complex are required for the process of transcription and the complex level is low in the presence of glucose. This way bacteria turns off transcription for lactose genes even when the lactose is present.
When performing self-myofascial
release of the hip adductors, the part of the body that focus should be on foam
rolling is the groin region inside the upper thigh. Self-myofascial release for
the adductor muscles is a great exercise to relax really tight and restricted
hip adductors.
Global warming is causing global mean sea level to rise in two ways. First, glaciers and ice sheets worldwide are melting and adding water to the ocean. Second, the volume of the ocean is expanding as the water warms.
