Describe the role of the corepressor molecule in the repressible operon system shown in Model 2. Read This! The trp operon in E. coli is an example of a repressible operon. The group of genes contained in this operon helps the organism produce the amino acid tryptophan from other compounds when tryptophan is not present in the cell's environment.

The lac operon is an inducible operon, whereas the trp operon is a repressible operon. Which of the following are true when comparing these two operons? If the first two are true and the remainder false, enter TTFFF. Inducible operons tend to be associated with catabolic pathways while repressible operons tend to be associated with synthetic ...

1. In a repressible operon under negative control, the repressor protein functions to a. stimulate transcription in the presence of a corepressor b. turn off transcription in the presence of an inducer c. stimulate transcription in the presence of a coactivator d. turn off transcription in the presence of a corepressor e.

Question: ? "Part A Which statement(s) about repressible operons is/are correct? Select all that apply. Repressible enzymes generally function in anabolic pathways. D A repressible operon is on unless a corepressor is present. ?In a repressible operon, the repressor is synthesized in an active form. Submit Request Answer Provide Feedback

In a repressible operon under negative control, the protein produced by the regulator gene will be synthesized as an active repressor. inactive activator. inactive repressor. None of the above is correct. active activator. When glucose and lactose are present, beta-galactosidase levels are None of the above is correct. the same as when both glucose

A repressible operon system, like the trp operon, contains three genes G, Z and W. As in the trp operon, operon genes are synthesized when the end product of the involved pathway is absent. As in the trp operon, there is no synthesis when the end product is present. One of the genes is the operator, one is a regulatory protein and the other is a

Only a repressible operon is an example of a system that uses negative control Only a repressible operon involves a repressor protein that is inactive unless bound by a co-repressor Only a repressible operon involves the inhibition of transcription Only a repressible operon contains a group of linked structural genes that are associated with a ...

Question: 7. Explain why the trp operon is described as a negative repressible operon. Discuss how the regulatory protein enables this type of regulation of the trp operon. 8. Indicate whether each of the following events will occurs under conditions of low tryptophan or of high tryptophan, motivate your answer. a. b.

Question: Place each of the following choices into the appropriate box to distinguish between a repressible operon and an inducible operon. Enzymes resulting from the transcription of this type of operon need only be present when a molecule, usually a nutrient, is present. This type of operon is usually involved in catabolic pathways.

The trp operon is an example of a repressible operon that is under negative control. Tryptophan, acts as a corepressor. Under conditions where tryptophan is plentiful, what happens to transcription of the operon? Explain the molecular mechanism that causes this effect.