when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?

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  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • Start studying The lac Operon. Learn vocabulary, terms, and more with … The binding of the lac repressor protein blocks the progression of. allosteric site. When lactose is present, it binds to the lac repressor protein at its. confirmation. When lactose binds to the lac repressor protein, it changes its. metabolism of lactose. When lactose …
  • https://quizlet.com/1989607/the-lac-operon-flash-cards/

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • -Lac repressor produced by LacI gene and binds to operator-Lactose (allosteric effector) in the environment binds to the repressor through allosteric transition changing its shape which causes the repressor to fall off the operator allowing RNA polymerase to fall off the lac promoter
  • https://quizlet.com/68816587/chapter-11-flash-cards/

  • Lac Repressor
  • The lac repressor is a DNA-binding protein that inhibits the expression of genes coding for proteins involved in the metabolism of lactose in bacteria. These genes are repressed when lactose is not available to the cell, ensuring that the bacterium only invests energy in the production of machinery necessary for uptake and utilization of lactose when lactose is present.
  • https://en.wikipedia.org/wiki/Lac_repressor




  • Repressor
  • What happens is a repressor binds to the operator and turns off the gene so the protein doesn’t get made. and when its needed the repressor detaches and the gene is turned back on. ( this all …
  • https://www.answers.com/Q/Repressor_protein_binds_with

  • Lac Operon
  • Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, … Lac operon. Overview: Gene regulation in bacteria. The lac operon. … Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, and cAMP.
  • https://www.khanacademy.org/science/biology/gene-regulation/gene-regulation-in-bacteria/a/the-lac-operon

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • 1)Where does the lac repressor bind to DNA? (1 point) 3) What effect does the binding of the lac repressor to the DNA have upon transcription of the lac operon? (2 points) 4) Under what conditions can lac repressor not bind to DNA? (2 points) 5) Which 3 structural genes are encoded by the lac operon? Name the functions of 2 of the protein products.
  • https://www.chegg.com/homework-help/questions-and-answers/1-lac-repressor-bind-dna-1-point-3-effect-binding-lac-repressor-dna-upon-transcription-lac-q20408121

  • Lac Repressor
  • The lac repressor is a protein tetramer, where all four identical components are 360 amino acids in length < >. When associated into its active tetramer form, the repressor has a molecular weight of 154, 520 Daltons. The repressor protein binds to a palindromic sequence of DNA on the lac promoter at the NH 2 < > terminus.
  • http://biology.kenyon.edu/BMB/Chime/Mat/MASTER.HTM

  • Lac Operon
  • Non-specific binding of the repressor to DNA plays a crucial role in the repression and induction of the Lac-operon. The specific binding site for the Lac-repressor protein is the operator. The non-specific interaction is mediated mainly by charge-charge interactions while binding to the operator is reinforced by hydrophobic interactions.
  • https://en.wikipedia.org/wiki/Lac_operon

  • Repressor
  • When lactose is present, it binds to the repressor that … The lac repressor protein has a binding site for … it binds to and inactivates the repressor by causing it to fall off the operator …
  • https://www.answers.com/Q/What_region_of_the_operon_does_the_repressor_bind_to

  • Repressor
  • Finally, the lacA gene encodes the protein lactose acetylase, with an unknown role. The promoter has a binding site, lacO, for the repressor protein, which overlaps the binding site for RNA polymerase. This region is also known as the operator, and when the repressor binds, RNA polymerase cannot transcribe the operon.
  • https://www.sciencedirect.com/topics/medicine-and-dentistry/repressor-protein

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  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • Start studying The lac Operon. Learn vocabulary, terms, and more with … The binding of the lac repressor protein blocks the progression of. allosteric site. When lactose is present, it binds to the lac repressor protein at its. confirmation. When lactose binds to the lac repressor protein, it changes its. metabolism of lactose. When lactose …
  • https://quizlet.com/1989607/the-lac-operon-flash-cards/

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • -Lac repressor produced by LacI gene and binds to operator-Lactose (allosteric effector) in the environment binds to the repressor through allosteric transition changing its shape which causes the repressor to fall off the operator allowing RNA polymerase to fall off the lac promoter
  • https://quizlet.com/68816587/chapter-11-flash-cards/

  • Lac Repressor
  • In its changed state, the lac repressor is unable to bind tightly to its cognate operator. Thus, the gene is mostly off in the absence of inducer and mostly on in the presence of inducer, although the degree of gene expression depends on the number of repressors in the cell and on the repressor’s DNA-binding affinity.
  • https://en.wikipedia.org/wiki/Lac_repressor




  • Lac Operon
  • When the lac repressor binds to the O region, RNA polymerase is prevented from beginning the process of transcription. In effect, the binding of the repressor protein turns the operon “off” by preventing the transcription of its genes. (Prentice Hall Biology Book …..Chapter 12 page 310)
  • https://www.answers.com/Q/What_does_the_lac_repressor_protein_bind_to_to_turn_the_lac_operon_off

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • 1)Where does the lac repressor bind to DNA? (1 point) 3) What effect does the binding of the lac repressor to the DNA have upon transcription of the lac operon? (2 points) 4) Under what conditions can lac repressor not bind to DNA? (2 points) 5) Which 3 structural genes are encoded by the lac operon? Name the functions of 2 of the protein products.
  • https://www.chegg.com/homework-help/questions-and-answers/1-lac-repressor-bind-dna-1-point-3-effect-binding-lac-repressor-dna-upon-transcription-lac-q20408121

  • Lac Repressor
  • When the lac repressor binds to the O region, RNA polymerase is prevented from beginning the process of transcription. In effect, the binding of the repressor protein turns the operon “off” by preventing the transcription of its genes. (Prentice Hall Biology Book …..Chapter 12 page 310)
  • https://www.answers.com/Q/A_lac_repressor_turns_off_the_lac_genes_by_binding_to

  • Lac Operon
  • Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, … The lac operon. … (EK), IST‑2.C.2 (EK) Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, and cAMP. Google Classroom Facebook Twitter. Email. Gene regulation in bacteria. Operons and gene regulation in bacteria.
  • https://www.khanacademy.org/science/biology/gene-regulation/gene-regulation-in-bacteria/a/the-lac-operon

  • Lac Operon
  • Non-specific binding of the repressor to DNA plays a crucial role in the repression and induction of the Lac-operon. The specific binding site for the Lac-repressor protein is the operator. The non-specific interaction is mediated mainly by charge-charge interactions while binding to the operator is reinforced by hydrophobic interactions.
  • https://en.wikipedia.org/wiki/Lac_operon

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • If glucose is absent, then CAP can bind to the operator sequence to activate transcription. If lactose is absent, then the repressor binds to the operator to prevent transcription. If either of these requirements is met, then transcription remains off. Only when both conditions are satisfied is the lac operon transcribed (Table \(\PageIndex{1}\)).
  • https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_General_Biology_(OpenStax)/3%3A_Genetics/16%3A_Gene_Expression/16.2%3A_Prokaryotic_Gene_Regulation

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • When lactose is present, the lac genes are expressed because allolactose binds to the Lac repressor protein and keeps it from binding to the lac operator. RNA polymerase can then bind to the promoter and transcribe the lac genes.
  • https://answersdrive.com/do-humans-have-the-lac-operon-3206177

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  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • Start studying The lac Operon. Learn vocabulary, terms, and more with … The binding of the lac repressor protein blocks the progression of. allosteric site. When lactose is present, it binds to the lac repressor protein at its. confirmation. When lactose binds to the lac repressor protein, it changes its. metabolism of lactose. When lactose …
  • https://quizlet.com/1989607/the-lac-operon-flash-cards/

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • -Lac repressor produced by LacI gene and binds to operator-Lactose (allosteric effector) in the environment binds to the repressor through allosteric transition changing its shape which causes the repressor to fall off the operator allowing RNA polymerase to fall off the lac promoter
  • https://quizlet.com/68816587/chapter-11-flash-cards/

  • Lac Repressor
  • In its changed state, the lac repressor is unable to bind tightly to its cognate operator. Thus, the gene is mostly off in the absence of inducer and mostly on in the presence of inducer, although the degree of gene expression depends on the number of repressors in the cell and on the repressor’s DNA-binding affinity.
  • https://en.wikipedia.org/wiki/Lac_repressor




  • Lac Operon
  • When the lac repressor binds to the O region, RNA polymerase is prevented from beginning the process of transcription. In effect, the binding of the repressor protein turns the operon “off” by preventing the transcription of its genes. (Prentice Hall Biology Book …..Chapter 12 page 310)
  • https://www.answers.com/Q/What_does_the_lac_repressor_protein_bind_to_to_turn_the_lac_operon_off

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • 1)Where does the lac repressor bind to DNA? (1 point) 3) What effect does the binding of the lac repressor to the DNA have upon transcription of the lac operon? (2 points) 4) Under what conditions can lac repressor not bind to DNA? (2 points) 5) Which 3 structural genes are encoded by the lac operon? Name the functions of 2 of the protein products.
  • https://www.chegg.com/homework-help/questions-and-answers/1-lac-repressor-bind-dna-1-point-3-effect-binding-lac-repressor-dna-upon-transcription-lac-q20408121

  • Repressor
  • In the lac operon model, lactose acts as in inducer molecule. In the presence of lactose, the molecule binds to the repressor protein. This repressor-lactose complex is unable to bind to the promoter. When the promoter is not occupied, RNA pol – II binds to it and begins transcribing the structural genes located downstream.
  • https://www.answers.com/Q/Repressor_protein_binds_with

  • Lac Operon
  • Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, … The lac operon. … (EK), IST‑2.C.2 (EK) Regulation of genes for lactose utilization. lac repressor, catabolite activator protein, and cAMP. Google Classroom Facebook Twitter. Email. Gene regulation in bacteria. Operons and gene regulation in bacteria.
  • https://www.khanacademy.org/science/biology/gene-regulation/gene-regulation-in-bacteria/a/the-lac-operon

  • Lac Operon
  • Non-specific binding of the repressor to DNA plays a crucial role in the repression and induction of the Lac-operon. The specific binding site for the Lac-repressor protein is the operator. The non-specific interaction is mediated mainly by charge-charge interactions while binding to the operator is reinforced by hydrophobic interactions.
  • https://en.wikipedia.org/wiki/Lac_operon

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • If glucose is absent, then CAP can bind to the operator sequence to activate transcription. If lactose is absent, then the repressor binds to the operator to prevent transcription. If either of these requirements is met, then transcription remains off. Only when both conditions are satisfied is the lac operon transcribed (Table \(\PageIndex{1}\)).
  • https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_General_Biology_(OpenStax)/3%3A_Genetics/16%3A_Gene_Expression/16.2%3A_Prokaryotic_Gene_Regulation

  • when the lac repressor protein binds to lactose, why does it fall off its binding site at the operator?
  • When lactose is present, the lac genes are expressed because allolactose binds to the Lac repressor protein and keeps it from binding to the lac operator. RNA polymerase can then bind to the promoter and transcribe the lac genes.
  • https://answersdrive.com/do-humans-have-the-lac-operon-3206177

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