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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Map%3A_Raven_Biology_12th_Edition/16%3A_Control_of_Gene_Expression/16.03%3A_Prokaryotic_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Courses/New_England_College/Microbiology_with_NEC/05%3A_Mechanisms_of_Microbial_Genetics/5.07%3A_Gene_Regulation_and_Operon_TheoryGenomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expressio...Genomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expression of a gene is a highly regulated process. Whereas regulating gene expression in multicellular organisms allows for cellular differentiation, in single-celled organisms like prokaryotes, it ensures that a cell’s resources are not wasted making proteins that the cell does not need at that time.
- https://bio.libretexts.org/Courses/Reedley_College/Biology_for_Science_Majors_I/15%3A_Gene_Expression/15.03%3A_Prokaryotic_Gene_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Courses/Portland_Community_College/Cascade_Microbiology/09%3A_Mechanisms_of_Microbial_Genetics/9.7%3A_Gene_Regulation%3A_Operon_TheoryGenomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expressio...Genomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expression of a gene is a highly regulated process. Whereas regulating gene expression in multicellular organisms allows for cellular differentiation, in single-celled organisms like prokaryotes, it ensures that a cell’s resources are not wasted making proteins that the cell does not need at that time.
- https://bio.libretexts.org/Workbench/Modern_Genetics/08%3A_Molecular_Genetics_II_-_Regulation_of_Gene_Expression/8.02%3A_Prokaryotic_Gene_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Courses/City_College_of_San_Francisco/Introduction_to_Genetics/08%3A_Genes_and_Proteins/8.07%3A_Gene_Expression/8.7.03%3A_Prokaryotic_Gene_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Workbench/BIOL_190%3A_General_Biology_(OpenStax)/03%3A_Unit_III-_Genetics/3.06%3A_Gene_Expression/3.6.03%3A_Prokaryotic_Gene_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/09%3A_Regulation_of_Gene_Expression/9.01%3A_Regulation_of_Gene_Expression_in_BacteriaThis page discusses gene expression regulation in E. coli, focusing on the lac operon, which metabolizes lactose through a repressor mechanism. When lactose is present, it enables transcription by det...This page discusses gene expression regulation in E. coli, focusing on the lac operon, which metabolizes lactose through a repressor mechanism. When lactose is present, it enables transcription by detaching the repressor. The page also covers the dual control by Catabolite Activator Protein (CAP), which requires cAMP for DNA binding, allowing prioritization of glucose over lactose.
- https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(Boundless)/07%3A_Microbial_Genetics/7.18%3A_Global_Regulatory_Mechanisms/7.18B%3A_The_trp_Operon_-_A_Repressor_OperonThe trp operon is a repressor operon that is either activated or repressed based on the levels of tryptophan in the environment.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_2e_(OpenStax)/03%3A_Unit_III-_Genetics/3.06%3A_Gene_Expression/3.6.03%3A_Prokaryotic_Gene_RegulationThe DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the s...The DNA of prokaryotes is organized into a circular chromosome supercoiled in the nucleoid region of the cell cytoplasm. Proteins that are needed for a specific function, or that are involved in the same biochemical pathway, are encoded together in blocks called operons. For example, all of the genes needed to use lactose as an energy source are coded next to each other in the lactose (or lac) operon.
- https://bio.libretexts.org/Courses/Prince_Georges_Community_College/PGCC_Microbiology/09%3A_Microbial_Genetics/9.06%3A_Gene_Regulation_-_Operon_TheoryGenomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expressio...Genomic DNA contains both structural genes, which encode products that serve as cellular structures or enzymes, and regulatory genes, which encode products that regulate gene expression. The expression of a gene is a highly regulated process. Whereas regulating gene expression in multicellular organisms allows for cellular differentiation, in single-celled organisms like prokaryotes, it ensures that a cell’s resources are not wasted making proteins that the cell does not need at that time.
