How does induction control enzyme synthesis using lactose operon?  2. Describe how level of a key metabolite [tryptophane] controls the gene function using tryptophane operon

1c  In context with transcription of prokaryotic genes briefly describe the effect the lac repressor protein has on transcription of the lac operon when it is bound to its binding site and the lac operon promoter, and how it accomplishes the effect.

47.

3 5. Suppose you performed a B-galactosidase assay on E. coli with a l*P+O°Z*Y operon. What results would you expect in the absence and presence of IPTG? 6. If you did not get the expected results for the previous question, but you knew the genotype of the operon was correct, name two ways your experiment could have gone wrong.

1. Please tell me: What's a mutation in moleculer terms? 2. When a mutation deletes a base in genomic DNA, how does it affect the expression product production and reading frame?  3. How does induction control enzyme synthesis using lactose operon?

28.  Which statement does NOT explain why the lac operon would not be effectively regulated by an attenuation mechanism like the trp operon? 1.Lactose is a substrate for the lac operon protein products.   2.Products of lac operon enzymes are not used in protein synthesis.   3.Transcription and translation do not happen simultaneously for the lac operon.   4.Attenuation is a suitable regulatory mechanism for anabolic amino acid pathways.   5.All of these statements explain why regulation by attenuation would not be effective for the lac operon.