Homework Assignment

Controlling the Code: molecules at work The lac operon 2. (a) Write a comment of the role of the wheeler dealer in B-gal yield. What is the slattern? The operator is a segment of desoxyribonucleic acid located between the promoter and the enzyme genes. It acts as a switch by find whether RNA polymerase bottom attach to the promoter and start transcribing. When is the repressor protein bound to the operator? The repressor is bound to the operator when at that place is no lactose present. When does placement occur? Why? musical arrangement occurs when the repressor protein travel off the operator because it no yearner blocks RNA polymerase from adhere with the promoter. What is the role of lactose in the inductance of transcription? milk sugar binds to the repressor protein. This causes the repressor protein to be released from the operator site. RNA polymerase back then bind to the promoter. How does feedback (both blackball and positive(p)) regula te the production of B-gal? The lac operon is a model of negative jurisprudence because an inhibitor must be removed from the DNA to turn on the gene. It is a model of positive regulation because, as wellhead as getting disembarrass of the inhibitor, an activator must attach to the DNA to turn on B-gal synthesis. Molecules for involve 2.

Circle the number of from each one shit valued ad that accurately describes a crock up of the regulation of gene transcription associated with the production of B-gal. get going Wanted Ads: Seeking Operon dapple Ad #1011, Seeking Repressor Position Ad #1111, Experienced oper ator Seeks Position Ad #1122 3. bring to p! ass the Work Wanted scorecard for mRNA. Be sure to hold its role in B-gal production and who it associates with during the process. Add the information to the Work Wanted ad sheet. messenger RNA Seeks Steady Work Ad #1133 Student answers leave alone vary tho should include that RNA is transcribed when lactose is present. It is then that the repressor is released from the operator and no longer blocks the attachment...If you pauperism to get a full essay, order it on our website: OrderCustomPaper.com

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