WebPredict and explain why changes in the levels of Lactose and ATP change gene expression of the lac operon in bacteria. 3. Explain how enhancer and silencer DNA regulates expression of nearby eukaryotic transcription units, and how transcription factors can act as master switches. 4. Predict and explain how acetylation of histones, methylation ... WebThe lac operon manages bacteria's usage of lactose for energy. Operons are clusters of genes managed by one promoter. lac operon's inducer is allolactose. lac operon is …
Lac Operon Flashcards Quizlet
WebINTERPRET DATA Develop a simple hypothesis that would explain the behavior of each of the following types of mutants in E. coli. Mutant a: The map position of this mutation is in the trp operon. ... In addition to observing similarities to the lac operon, you also notice that this gene is regulated via attenuation, similar to the trp operon ... WebThe lac repressor protein binds to the lacO sequence and turns off the expression of the lac operon (in other words, the lac operon displays negative control via the lac repressor). The lacI gene is a constitutive (housekeeping) gene and is therefore always transcribed. good hair salons near me cheap
15: Positive and negative control of gene expression
WebNow, the operon that I've drawn here happens to represent the lac operon, and the lac operon is an example of an inducible set of genes which are responsible for importing and breaking down the sugar molecule lactose to use as a source of energy. So, in the event that glucose, which is the ideal source of carbon and energy for a cell, if that's ... WebSee Page 1. e) Use the diagram below of the lac I gene and lac operon for the following questions. (I = lac repressor gene; Z, Y, A = lac operon structural genes; P = lac … WebApr 7, 2024 · Lac operon contains genes involved in metabolism. The genes are expressed only when lactose is present and glucose is absent. The operon is put in on and off mode in response to the glucose and lactose levels: catabolite activator protein and lac repressor. The lac repressor comes in the way of transcription of the operon. good hair salons near me to dye hair