Lac operon - Studienführer, Klassennotizen & Zusammenfassungen

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CBE 235 Final Question and answers rated A+ 2023/2024 Lac Operon - correct answer -involved in heating lactose: inducible operon 1) The lactose repressor protein coded by Lacl bound to the operator tightly near the mRNA start site, blocking the ability of RNA poly to bind 2) Lactose introduced--> Lac repressor binds to lactose and changes conformation such that it can no longer bond to the operator 3) RNA poly can access the promoter and transcription goes 4) LacZ,LacY,LacA are transcribe...

Transcription of the lac operon is very high. - Answer-What is the phenotype of an E. Coli strain with a mutation in the lac operator that prevents the lac repressor from binding? Assume glucose is absent and lactose is present. Attenuation is a common regulatory strategy used to control the transcription of operons that code for: - Answer-Amino acid biosynthesis Phase variation of flagellar proteins in Salmonella enterica involves... - Answer-DNA rearrangements A quorum-sensing gene sy...

All of the following are characteristics that make plasmids good cloning vectors, except A. they are small B. they are well characterized C. they can be transferred into appropriate host cells D. they can carry genetic markers, such as antibiotic resistance genes E. they can accept a relatively large amount of foreign DNA Ans: E. they can accept a relatively large amount of foreign DNA Types of Plasmids: -Fertility Factors -Resistance Factors -Bacteriocin Factors -Virulence Plasmids ...

Micro 201 Exam 3 (3) - Lac Operon With Complete Solutions 2023

operon - Answer a series of genes whose expression is co-regulated by controlling their common mRNA transcript lacZ gene - Answer structural gene in lac operon which codes for beta-galactosidase, to break down beta-galactosides (which includes lactose) into glucose and galactose lacY gene - Answer structural gene in lac operon which codes for permease, which transports beta-galactosides into the cell. permeases are membrane bound lacA gene - Answer structural gene in lac operon which co...

Biology 2 Exam Lac Operon Questions And Answers 2023

the lac operon is expressed when glucose is low and lactose is high when in a complex with ____, the CAP protein binds to the CAP site and _____ the expression of lac operon. cAMP; switches on in the absence of lactose, the lac repressor is active and can bind to the operator which region associated with the lac operon is not involved in the binding of RNA polymerase? lacZ RNA polymerase binds to the promoter the most efficient control of eukaryotic gene expression is achieved at the level ...

What will be the effect on transcription when an inhibitor is in play? A. Allow transcription B. Prevent transcription - Answer-B Explanation: An inhibitor prevents activator from binding to DNA; activators are used in positive regulation (increasing transcription) - thus, the inhibitor prevents the activator from positive regulating (increasing) transcription. What will be the effect on transcription when an inducer is in play? A. Allow transcription B. Prevent transcription - Answer-A Ex...