OUTLINE 3 Control of Gene Expression in Prokaryotes

Slides:



Advertisements
Similar presentations
Regulation of Gene Expression in Prokaryotes
Advertisements

OUTLINE 3 III.Control of Gene Expression in Prokaryotes A. Regulatory proteins B. The operon model C. Examples 1. the lac operon (substrate induction)
Gene Regulation Prokaryotes (no nucleus). Lac operon System of genes that can turn on and off in E. coli (bacteria). These genes make enzymes that break.
AP Biology Chapter 18: Gene Regulation. Regulation of Gene Expression Important for cellular control and differentiation. Understanding “expression” is.
Why Regulate Gene Expression? Response to changing developmental or environmental conditions Save… time time energy energy raw materials raw materials.
Bacterial Operons A model of gene expression regulation Ch 18.4.
Regulation of Gene Expression. Prokaryotes –Constituitive Gene Expression (promoters) –Regulating Metabolism (promoters and operators) –Regulating Development.
Control of Gene Expression Big Idea 3: Living systems store, retrieve, transmit, and respond to info essential to life processes.
Microbial Genetics (Micr340) Lecture 15 Regulation of Gene Expression.
Gene regulation  Two types of genes: 1)Structural genes – encode specific proteins 2)Regulatory genes – control the level of activity of structural genes.
Biology II Development. ? ? Muscle Nerve Blood Intestinal EGG.
Today: Regulating gene expression in bactria Exam #1 T 2/17 in class Available: F and M 10-11am, noon-2pm, after 3pm T after 2pm.
Regulation of gene expression in prokaryotes Katalin Kiss Dept. of Medical Biology
Biology Chapter 12 Section 5 Gene Regulation. Objectives ______________a typical gene _________how lac genes are turned off and on __________how most.
Gene Regulation, Part 1 Lecture 15 Fall Metabolic Control in Bacteria Regulate enzymes already present –Feedback Inhibition –Fast response Control.
William S. Klug Michael R. Cummings Charlotte A. Spencer Concepts of Genetics Eighth Edition Chapter 16 Regulation of Gene Expression in Prokaryotes Copyright.
Regulation of Gene Expression in Prokaryotes
Gene Expression. Remember, every cell in your body contains the exact same DNA… …so why does a muscle cell have different structure and function than.
Gene Regulation Packet #46 Chapter #19.
Prokaryotic cells turn genes on and off by controlling transcription.
Microbial Genetics - DNA Transfer l Review of Information Transfer in Cell l Recombination l Transfer of DNA &Genetic Recombination in Bacteria –Conjugation.
Bacteria Gene Regulation. Compare/Contrast Prokaryotic and Eukaryotic Protein Synthesis.
PROKARYOTE GENE REGULATION transcriptional control post-transcriptional control post-translational control REGULATION OF TRANSCRIPTION Negative Positive.
Discover Biology, 5 th Ed. C14: DNA and Genes. What is the hereditary material? Chromosomes – DNA – Protein Genes – Located on chromosomes Source of Inherited.
Copyright © 2008 Pearson Education Inc., publishing as Pearson Benjamin Cummings 18.1: The trp operon.
Gene Expression & Regulation Chapter 8.6. KEY CONCEPT Gene expression is carefully regulated in both prokaryotic and eukaryotic cells.
Gene Expression Chapter 16. DNA regulatory sequence All on DNA Promoters – Start transcription Promoters – Start transcription Terminators – End Transcription.
Microbiology B.E Pruitt & Jane J. Stein AN INTRODUCTION EIGHTH EDITION TORTORA FUNKE CASE Chapter 8, part B Microbial Genetics.
OPERONS – GENES THAT CODE FOR ENZYMES ON THE SAME PATHWAY ARE REGULATED AS A GROUP.
OUTLINE Meiosis and Sexual Reproduction
Chapter 8, part B Microbial Genetics.
Chapter 8, part B Microbial Genetics.
Genetics of Bacteria Bacterial genome =.
8 Microbial Genetics.
Control of Gene Expression
Control of Prokaryotic (Bacterial) Genes
Lac Operon Lactose is a disaccharide used an energy source for bacteria when glucose is not available in environment Catabolism of lactose only takes place.
OUTLINE 2 II. Cell Differentiation A. What do we know?
Control of Prokaryotic (Bacterial) Genes
Control of Gene Expression
Chapter 16 Control of Gene Expression
Transcriptional Regulation
Prokaryotic cells turn genes on and off by controlling transcription.
DRAW ME A PICTURE OF lac operon when it’s “turned off”
Bacterial Genetics Ch. 18.
Prokaryotic cells turn genes on and off by controlling transcription.
Regulation of Gene Expression
Gene Regulation in Prokaryotes
DRAW ME A PICTURE OF lac operon when it’s “turned on”
Daily Warm-Up Tuesday, Jan. 7th
Homework #2 is posted and due 10/17
Chapter 12.5 Gene Regulation.
The Operon Hypothesis The Operon Hypothesis was developed by 2 researchers: Jacob and Monod It explains how genes are regulated in prokaryotes. They received.
Gen Expression Constitutive Enzymes not Regulated
Patterns of control of gene expression
Prokaryotic cells turn genes on and off by controlling transcription.
Gene Regulation Packet #22.
Prokaryotic cells turn genes on and off by controlling transcription.
Transcriptional Regulation in Prokaryotes.
Principles of Molecular Biology
Chapter 18 Bacterial Regulation of Gene Expression
Review Warm-Up What is the Central Dogma?
Prokaryotic (Bacterial) Gene Regulation
Prokaryotic Genomes Chapter 18.
Prokaryotic cells turn genes on and off by controlling transcription.
Prokaryotic cells turn genes on and off by controlling transcription.
Chapter 8, part B Microbial Genetics.
Regulation of Gene Transcription
Prokaryotic cells turn genes on and off by controlling transcription.
Presentation transcript:

OUTLINE 3 Control of Gene Expression in Prokaryotes A. Regulatory proteins B. The operon model C. Examples 1. the lac operon (substrate induction) 2. the tryp operon (end product repression) 3. the lac operon (positive control)

Fig. 18.21 Negative regulation: Substrate induction

Negative regulation: end-product repression Fig 18.20

Positive regulation of the lac operon Fig. 18.22a Positive regulation of the lac operon

Positive regulation of the lac operon Fig. 18.22b Positive regulation of the lac operon

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.