Textbook Question
Activators bind to regulatory sequences in ________ and to ________ polymerase.
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Ch. 18 - Control of Gene Expression in Bacteria
Freeman7th EditionBiological ScienceISBN: 9783584863285
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Table of contents
- Ch. 1 - Biology: The Study of Life11
- Ch. 2 - Water and Carbon: The Chemical Basis of Life10
- Ch.3 - Protein Structure and Function11
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells10
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation16
- Ch. 10 - Photosynthesis14
- Ch. 11 - Cell-Cell Interactions14
- Ch. 12 - The Cell Cycle12
- Ch. 13 - Meiosis13
- Ch. 14 - Mendel and the Gene32
- Ch. 15 - DNA and the Gene: Synthesis and Repair8
- Ch. 16 - How Genes Work35
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria19
- Ch. 19 - Control of Gene Expression in Eukaryotes17
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers23
- Ch. 21 - Genes, Development, and Evolution13
- Ch. 22 - Evolution by Natural Selection17
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea17
- Ch. 27 - Diversification of Eukaryotes19
- Ch. 28 - Green Algae and Land Plants18
- Ch. 29 - Fungi19
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals20
- Ch. 32 - Deuterostome Animals19
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function16
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development18
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology16
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology16
- Ch. 54 - Biodiversity and Conservation Ecology16
Chapter 18, Problem 4
A regulon is a set of genes controlled bya. one type of regulator of transcription.b. two or more different alternative sigma proteins.c. many different types of promoters.d. glucose.
Verified step by step guidance1
Identify the definition of a regulon: A regulon is a collection of genes or operons that are regulated by the same regulatory protein.
Analyze the options given in the question to determine which one aligns with the definition of a regulon.
Consider the role of regulators of transcription and how they influence gene expression.
Evaluate the relationship between sigma proteins, promoters, and glucose in the context of gene regulation.
Select the option that correctly identifies the common element used to control the genes in a regulon.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Regulon
A regulon is a collection of genes that are regulated together, typically by a single regulatory protein or transcription factor. This allows for coordinated expression of genes that are involved in similar functions or responses to environmental changes. Understanding regulons is crucial for grasping how cells manage gene expression in response to various stimuli.
Transcription Regulation
Transcription regulation refers to the mechanisms that control the transcription of genes, determining when and how much of a gene product is made. This process can involve various proteins, including transcription factors and sigma factors, which bind to specific DNA sequences to enhance or inhibit gene expression. It is essential for cellular responses to internal and external signals.
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Sigma Factors
Sigma factors are proteins that bind to RNA polymerase and direct it to specific promoters for transcription initiation. Different sigma factors recognize different sets of promoters, allowing bacteria to adapt their gene expression in response to environmental changes. Understanding sigma factors is key to comprehending how regulons can be controlled by multiple regulatory mechanisms.
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Related Practice
Textbook Question
Activators bind to regulatory sequences in ________ and to ________ polymerase.
1205
views
Textbook Question
A regulon is a set of genes controlled by
a. One type of regulator of transcription
b. Two or more different alternative sigma proteins
c. Many different types of promoters
d. Glucose
869
views
Textbook Question
Evaluate these statements about regulation of the lac operon. Select True or False for each statement.T/FThe lac operon is transcribed at the highest rate when extracellular glucose and lactose are abundant.T/FThe repressor protein is bound to DNA of the operator when lactose is present.T/FA mutation in the operator is likely to prevent transcription of the lac operon under any condition.T/FA mutation that alters the catabolite activator protein is predicted to alter the regulation of many different operons.
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Textbook Question
Predict what would happen to regulation of the lac operon if the lacI gene were moved 50,000 nucleotides upstream of its normal location.
781
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Textbook Question
Predict what would happen to regulation of the lac operon if the lacI gene were moved 50,000 nucleotides upstream of its normal location.
800
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