This complex binds to the lac promoter at the CAP binding site, bending the DNA to allow increased transcription by RNA polymerase. c.Glucose helps to prevent expression of the lac operon genes, a …

The lac operon in E. coli controls the gene expression of the enzymes that digest lactose in the cell. In the presence of lactose the lac operon will turn on and the genes will be expressed.

Which of the following statements about regulation of the lac operon is INCORRECT? When glucose and lactose are absent from the cell, the lac operon is turned off.

Science Biology Biology questions and answers What is the function of the promoter in the E. coli lac operon? The promoter is a region of DNA at the start of the lac operon, where RNA p binds to begin …

 The lac operon in E coli controls the gene expression of the enzymes that digest lactose in the cell. In the absence of lactose, the lac operon will turn off and gene expression will be inactivated.

The lac operon in E. coli controls the gene expression of the enzymes that digest lactose in the cell. In the absence of lactose, the lac operon will turn off and gene expression will be inactivated.

Question: Suppose Jim isolated four E. coli mutants, mut1 to mut4, that showed abnormal expression of the Lac permease protein. To identify the defect in each mutant, he determined the relative levels of …

The following diagram shows the configuration of the Lac operon under various conditions depending on the concentration of glucose and lactose in the environment of this bacterium.

Question: Which is incorrect about inducible operons? Multiple Choice They have genes tumed off by a buildup of end product. They are often for use in catabolic pathways. They are normally turned off. e …

Science Biology Biology questions and answers Describe the structure of the lac operon. Drag the appropriate labels to their respective targets.