What term is used to describe the DNA sequence to which a repressor binds? attenuator operator controller activator
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- Compare and contrast regulation by a repressor and an activator.Contrast the role of the repressor in an inducible system and in a repressible system.When taken up by a cell, which of the following molecules binds to a repressor so that the repressor no longer binds to the operator? a) inducer b) promoter c) repressor d) corepressor
- A molecule that reduces the activity of an enzyme by binding to a site other than the site at which the substrate normally binds is termed a/an _____. Question options: transcription factor allosteric activator hormone competitive inhibitor noncompetitive inhibitorA repressor is a __________ that _________ transcription. a. small effector molecule, inhibits b. small effector molecule, enhances c. regulatory protein, inhibits d. regulatory protein, enhancesA gene in liver cells is "off". In the presence of a toxin, a repressor is removed and the gene is transcribed at low levels. How would you describe this regulation? A. Positive induction B. Negative induction C. Positive repression D. Negative repression
- A protein binds a DNA sequence several hundred base pairs upstream of a promoter in a eukaryotic organism. This results in an increased rate of transcription of the gene. What type of protein is this? Group of answer choices Activator Silencer Enhancer RepressorWhat is the function of a repressor protein? Question 3 options: To turn on transcription by binding to the activator. To turn off transcription by binding to the operator. To turn on transcription by binding to the operator. To turn off transcription by binding to the activator.Which DNA regulatory sequence speeds up transcription? a promoter b repressor c silencer d enhancer