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One way to control metabolic pathways, or other conditions that involve proteins, is to regulate the rate of production of a protein/enzyme. This is called controlling gene expression (gene expression is another term used for protein synthesis). Because organisms have several thousand genes, it would be inefficient and harmful to continually express (continually make proteins from) all genes. Increasing the rate of gene expression is called upregulation of the gene; decreasing the rate of gene expression is called downregulation of the gene. Determine whether each of the following conditions would result in the genes of the lac operon being upregulated or downregulated. a) RNA polymerase is able to move along the lac operon b) Allolactose binds to the repressor protein c) Lactose concentration within a cell is increased

One way to control metabolic pathways, or other conditions that involve proteins, is to regulate the rate of production of a protein/enzyme. This is called controlling gene expression (gene expression is another term used for protein synthesis). Because organisms have several thousand genes, it would be inefficient and harmful to continually express (continually make proteins from) all genes. Increasing the rate of gene expression is called upregulation of the gene; decreasing the rate of gene expression is called downregulation of the gene. Determine whether each of the following conditions would result in the genes of the lac operon being upregulated or downregulated. a) RNA polymerase is able to move along the lac operon b) Allolactose binds to the repressor protein c) Lactose concentration within a cell is increased

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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One way to control metabolic pathways, or other conditions that involve proteins, is to regulate the rate of production of a protein/enzyme. This is called controlling gene expression (gene expression is another term used for protein synthesis). Because organisms have several thousand genes, it would be inefficient and harmful to continually express (continually make proteins from) all genes. Increasing the rate of gene expression is called upregulation of the gene; decreasing the rate of gene expression is called downregulation of the gene. Determine whether each of the following conditions would result in the genes of the lac operon being upregulated or downregulated. a) RNA polymerase is able to move along the lac operon b) Allolactose binds to the repressor protein c) Lactose concentration within a cell is increased d) Allolactose concentration within a cell is increased e) Glucose is not available f) Active repressor proteins are present in the absence of allolactose
Transcribed Image Text:One way to control metabolic pathways, or other conditions that involve proteins, is to regulate the rate of production of a protein/enzyme. This is called controlling gene expression (gene expression is another term used for protein synthesis). Because organisms have several thousand genes, it would be inefficient and harmful to continually express (continually make proteins from) all genes. Increasing the rate of gene expression is called upregulation of the gene; decreasing the rate of gene expression is called downregulation of the gene. Determine whether each of the following conditions would result in the genes of the lac operon being upregulated or downregulated. a) RNA polymerase is able to move along the lac operon b) Allolactose binds to the repressor protein c) Lactose concentration within a cell is increased d) Allolactose concentration within a cell is increased e) Glucose is not available f) Active repressor proteins are present in the absence of allolactose
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