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Regulation of Gene Expression: Operons, Epigenetics, and Transcription Factors
 
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We learned about gene expression in biochemistry, which is comprised of transcription and translation, and referred to as the "central dogma" of molecular biology. But how is this process regulated? How does a cell know which genes to express and when? Well it's pretty complicated, but let's just get our feet wet by looking at operons, epigenetics, and transcription factors! Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains Biology Tutorials: http://bit.ly/ProfDaveBio Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Gene Regulation and the Order of the Operon
 
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Explore gene expression with the Amoeba Sisters, including the fascinating Lac Operon found in bacteria! Learn how genes can be turned "on" and "off" and why this is essential for cellular function. Check out our FREE video handouts on http://www.amoebasisters.com/handouts! Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Views: 481670 Amoeba Sisters
Gene Regulation
 
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031 - Gene Regulation Paul Andersen explains how genes are regulated in both prokaryotes and eukaryotes. He begins with a description of the lac and trp operon and how they are used by bacteria in both positive and negative response. He also explains the importance of transcription factors in eukaryotic gene expression. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ All of the images are licensed under creative commons and public domain licensing: Bioinformatik, English: Jawahar Swaminathan and MSD staff at the European Bioinformatics InstituteDeutsch: Jawahar Swaminathan und MSD Mitarbeiter am Europäischen Institut für BioinformatikPlattdüütsch: Jawahar Swaminathan un de Lüüd von MSD an dat Europääsche Institut för. English: Cartoon Representation of the Molecular Structure of Protein Registered with 2nvw Code., [object HTMLTableCellElement]. English: http://www.ebi.ac.uk/pdbe-srv/view/images/entry/2nvw600.png, displayed on http://www.ebi.ac.uk/pdbe-srv/view/entry/2nvw/summary. http://commons.wikimedia.org/wiki/File:PDB_2nvw_EBI.jpg. DNA, n.d. http://openclipart.org/detail/58543/dna-by-kumar35885. "File:E Coli at 10000x, Original.jpg." Wikipedia, the Free Encyclopedia, November 13, 2013. http://en.wikipedia.org/w/index.php?title=File:E_coli_at_10000x,_original.jpg&oldid=478393073. "File:Glass of Milk on Tablecloth.jpg." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Glass_of_milk_on_tablecloth.jpg. "File:Lac operon1.png." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Lac_operon1.png. "File:Protein TBP PDB 1c9b.png." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Protein_TBP_PDB_1c9b.png. "File:Ribosome mRNA Translation En.svg." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Ribosome_mRNA_translation_en.svg. Forluvoft. Simple Cartoon of Transcription Termination, October 9, 2007. Own work. http://commons.wikimedia.org/wiki/File:Simple_transcription_termination1.svg. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Views: 1113072 Bozeman Science
Gene regulation in prokaryotes
 
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This lecture explains about the Gene regulation in prokaryotes. Regulation of gene expression entails a broad range of mechanisms that are used by cells to develop or diminish the production of specific gene products (protein or RNA), and is informally termed gene legislation. Subtle applications of gene expression are greatly located in biology, for example to trigger developmental pathways, respond to environmental stimuli, or adapt to new food sources. Practically any step of gene expression may also be modulated, from transcriptional initiation, to RNA processing, and to the put up-translational amendment of a protein. Gene law is main for viruses, prokaryotes and eukaryotes as it raises the flexibility and suppleness of an organism via allowing the mobile to express protein when wanted. Despite the fact that as early as 1951 Barbara McClintock confirmed interplay between two genetic loci, Activator (Ac) and Dissociator (Ds), within the color formation of maize seeds, the primary discovery of a gene legislation procedure is largely regarded to be the identification in 1961 of the lac operon, learned by means of Jacques Monod, where some enzymes concerned in lactose metabolism are expressed with the aid of the genome of E. Coli most effective in the presence of lactose and absence of glucose. Furthermore, in multicellular organisms, gene legislation drives the approaches of mobile differentiation and morphogenesis, leading to the creation of specific mobilephone types that possess distinct gene expression profiles, and as a consequence produce distinctive proteins/have different ultrastructures that swimsuit them to their features (though all of them possess the genotype, which follows the equal genome sequence). The initiating event leading to a change in gene expression comprise activation or deactivation of receptors. Also, there may be evidence that alterations in a cell's choice of catabolism results in altered gene expressions. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching
Views: 76215 Shomu's Biology
Gene regulation in eukaryotes
 
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Gene regulation in eukaryotes - This lecture explains about the eukaryotic gene regulation. Regulation of gene expression entails a vast variety of mechanisms which can be utilized by cells to expand or shrink the creation of particular gene products (protein or RNA), and is informally termed gene legislation. Subtle packages of gene expression are greatly found in biology, for illustration to set off developmental pathways, reply to environmental stimuli, or adapt to new food sources. Virtually any step of gene expression can also be modulated, from transcriptional initiation, to RNA processing, and to the post-translational change of a protein. Gene regulation is main for viruses, prokaryotes and eukaryotes because it raises the flexibility and adaptability of an organism via permitting the cellphone to specific protein when needed. Although as early as 1951 Barbara McClintock confirmed interaction between two genetic loci, Activator (Ac) and Dissociator (Ds), in the color formation of maize seeds, the first discovery of a gene law approach is widely regarded to be the identification in 1961 of the lac operon, learned through Jacques Monod, in which some enzymes involved in lactose metabolism are expressed by using the genome of E. Coli handiest within the presence of lactose and absence of glucose. Furthermore, in multicellular organisms, gene regulation drives the processes of cellular differentiation and morphogenesis, main to the creation of unique cellphone forms that possess different gene expression profiles, and therefore produce one of a kind proteins/have special ultrastructures that suit them to their capabilities (although they all possess the genotype, which follows the equal genome sequence). The initiating event main to a transformation in gene expression include activation or deactivation of receptors. Additionally, there's proof that alterations in a mobile's option of catabolism results in altered gene expressions. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching
Views: 126186 Shomu's Biology
OPERON model (regulation of gene expression)
 
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Buy my special, in-depth, explanatory reading material for NEET/AIIMS. This will be very helpful in your preparation. Send your mail to [email protected]
Views: 28315 BIOLOGY BY P K AGRAWAL
Gene Regulation in Eukaryotes
 
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Donate here: http://www.aklectures.com/donate.php Website video link: http://www.aklectures.com/lecture/gene-regulation-in-eukaryotes Facebook link: https://www.facebook.com/aklectures Website link: http://www.aklectures.com
Views: 114236 AK LECTURES
REGULATION OF GENE EXPRESSION
 
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For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. Regulation of gene expression includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA), and is informally termed gene regulation.
Views: 8686 7activestudio
Regulation of transcription | Biomolecules | MCAT | Khan Academy
 
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Created by Tracy Kim Kovach. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/gene-control/v/post-translational-regulation?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/gene-control/v/dna-and-chromatin-regulation?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 238920 khanacademymedicine
Biology Molecular Basis of Inheritance part 30 (Regulation of Gene Expression) class 12 XII
 
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Biology Molecular Basis of Inheritance part 30 (Regulation of Gene Expression) class 12 XII
Views: 45544 ExamFear Education
Operons and gene regulation in bacteria
 
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Looking at how regulatory DNA sequences can repress or promote gene transcription (particularly in bacteria operons).
Views: 144603 Khan Academy
Regulation of gene expression in eukaryotes and prokaryotes for NEET AIIMS JIPMER.
 
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U can like my Facebook page ie. Vipin Sharma Biology Blogs for more information regarding every national level competitive exam in which biology is a part . Like this video share it with your frnds n subscribe to my channel if u r new. Thanq so much for supporting me guys 👍 😊. https://mbasic.facebook.com/Vipin-Sharma-Biology-Blogs-588472744670315/?__xt__=11.%7B%22event%22%3A%22visit_page_tab%22%2C%22user_id%22%3A100003119064758%2C%22page_id%22%3A588472744670315%7D Lac operon :- https://youtu.be/-xwufWEtIcg
How Genes are Regulated: Transcription Factors
 
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Like us on Facebook: https://www.facebook.com/pages/Stroma-Studios/290868104261105?sk=wall Each cell in our body inherits the same master copy of DNA, but different cell types use it differently. Transcription Factors help influence which genes are used in which cell. Understanding how these dynamic proteins physically interact with DNA allows us to better understand and model their binding to DNA and their regulation of gene expression. Scientific Direction by the Wasserman Lab at the University of British Columbia: http://www.cmmt.ubc.ca/research/investigators/wasserman/lab Animation and editing by Blair Lyons of Stroma Studios: http://www.stromastudios.com
Views: 297082 Blair Lyons
Gene Expression
 
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A video by Genome British Columbia demonstrating gene expression www.genomicseducation.ca
Views: 478851 Genome BC
A2 Biology: Gene Regulation
 
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An explanation of how Homeobox genes are 'master regulators' of determining the body plans of developing organisms.
Views: 7184 Dr Bhavsar
Gene expression and function | Biomolecules | MCAT | Khan Academy
 
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Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video. Created by Ronald Sahyouni. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/applications-of-dna-technologies?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/dna-technology/v/dna-sequencing?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 105124 khanacademymedicine
Eukaryotic regulation of gene expression
 
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Discussing additional mechanisms that eukaryotes have to control how often genes are expressed, and how often mRNAs are translated. This includes discussing additional DNA regulatory regions (enhancers, silencers), histone packing / unpacking, and RNA interference
Views: 98876 BleierBiology
03 The Regulation of Gene Expression in Bacteria
 
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Video Index. The lac operon 19m44s The trp operon 1h15m30s The SOS Response 1h36m48s
Views: 6025 Mark Temple
Eukaryotic Regulation of Gene Expression
 
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Moof's Medical Biochemistry Video Course: http://moof-university.thinkific.com/courses/medical-biochemistry-for-usmle-step-1-exam
Views: 30684 Moof University
NEET / AIIMS 2018  - Molecular Basis of Inheritance Lecture - 18 (Gene Regulation & Operon)
 
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This lecture is on mechanisms of Gene Regulation. Lac Operon & related concepts explained.
Lac Operon
 
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NDSU Virtual Cell Animations Project animation 'Lac Operon'. For more information please see http://vcell.ndsu.edu/animations The Lac Operon is an example of an inducible system of gene expression. Its default state is to be inactive. Only when the right catalyst is added to the system, in this case the sugar lactose, is the process activated, allowing the genes in question to be expressed.
Views: 1254896 ndsuvirtualcell
Regulation of Gene Expression Overview
 
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Quick intro to the six levels of regulation of gene expression.
Views: 606 thelifeologist
Post-transcriptional regulation | Biomolecules | MCAT | Khan Academy
 
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Created by Tracy Kim Kovach. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/biomolecules/gene-control/v/non-coding-rna-ncrna?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/biomolecules/gene-control/v/regulation-of-transcription?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 120969 khanacademymedicine
Prokaryotic regulation of gene expression
 
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How prokaryotes regulate how actively their genes are expressed (on or off, up or down). I discuss both negative gene regulation (involving repressors) and positive gene regulation (involving activators), discussing the classic trp and lac operon systems where this was first studied.
Views: 40212 BleierBiology
Prokaryote Gene Regulation
 
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Operons
Views: 6974 Anne Johnson
Lac Operon - gene regulation in prokaryotes
 
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This lecture explains the lac operon and the regulation of gene expression in prokaryotes by lac operon. The lac operon consists of three structural genes, and a promoter, a terminator, regulator, and an operator. The three structural genes are: lacZ, lacY, and lacA. lacZ encodes β-galactosidase (LacZ), an intracellular enzyme that cleaves the disaccharide lactose into glucose and galactose. This video lecture will teach you the mechanism of lac operon. It will also explain the positive and negative regulation of Lac operon and how it is controlled in response to the presence of Glucose. This video will also help you to realize the difference between a catabolic and an anabolic operon. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 Thank you for watching the video lecture on Lac operon and regulation of lac operon.
Views: 217140 Shomu's Biology
Control of Gene Expressions in Bacteria
 
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Topic: Control of gene expression in bacteria: positive vs negative control and inducible vs repressible Group: Isabela Alesna, Bo-Sung Kim, Midori Yoshino We’ll be covering the “Control of gene expression in bacteria”: This happens through transcriptional control and operon control . Before we jump into the process, let’s define things first. In the control of gene expression, there are a few key players: the operon, promoter, operator, structural genes, regulatory gene, and regulatory protein. An operon is a group of bacterial structural genes and sequences that control transcription of those genes into a single mRNA. Within the operon is then a promoter, a sequence that RNA polymerase can recognize and bind to. An operator, which is the place where a regulatory protein can bind to turn the operon on or off. And structural genes, the sequences that encode for protein. A regulatory gene, located outside of the operon, is a sequence that makes the regulatory protein which as we said before binds to the operator This will all make more sense in a bit! So back to talking about the actual gene expression! There are 2 types of transcriptional control. Negative control and Positive control. In both cases the regulatory protein acts like an on/off switch. Negative control is when the regulatory protein is a repressor. It binds to the operon and inhibits transcription. Like a switch, the regulatory protein turns gene expression off. And Positive control is when the regulatory protein is an activator. It binds to the operon and and stimulates transcription. Like a switch, the regulatory protein turns gene expression on. Now there are 2 types of operon control. Inducible operon and Repressible operon. First, there is the inducible operon. Here, gene expression is usually turned off either by an active repressor or an inactive activator. It can be induced, aka turned on. Then there is the repressible operon. Here, gene expression is usually turned on either by an inactive repressor or an active activator. It can be repressed, aka turned off. Let’s put it all together! In summary, there is Negative Inducible, Positive Inducible, Negative Repressible, and Positive Repressible. Negative Inducible is when the regulatory protein is an active repressor is bound to the operon, and transcription is off. Positive Inducible is when the regulatory protein is an inactive activator and is not bound to the operon, and transcription is off. In both of these cases, they can be INDUCED (or encouraged) to be turned on. Negative Repressible is when the regulatory protein is an inactive repressor, does not bind to the operon, and transcription is on. Positive Repressible is when the regulatory protein is an active activator, binds to the operon, and transcription is on. In both of these cases, they can be REPRESSED (or restrained) to be turned off. Let’s look at a specific example of negative inducible. The most popular negative inducible system is the lac operon. The lac operon is responsible for making enzymes that break down lactose. When there isn’t any lactose around, the lac operon is turned off--there’s no need to make that protein if it won’t be doing anything. Therefore the repressor is bound to the operator, inhibiting transcription of the gene. BUT. when a lactose (allolactose) is present, it binds to the repressor. The repressor protein changes its shape and becomes inactive, meaning it cannot bind to the operator. Therefore, the gene is turned on and makes a series of enzymes which can then break down the lactose. Let’s look at an example for negative repressible, dealing with Tryptophan. The trp operon is responsible for controlling biosynthesis of the amino acid tryptophan, in E. coli. When tryptophan level is low, the repressor is inactive and cannot bind to the operator. So the gene expression is turned on. Transcription takes place and more tryptophan is synthesized. When tryptophan level is high, tryptophan binds to the inactive repressor, making it active. The repressor then binds to the operator and turn off the gene expression. Hope you liked our video on the Control of gene expression in bacteria!
Views: 31032 Bo-Sung Kim
Lac Operon | Hindi
 
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The topic is explained in very simple student friendly language and in HINDI. The video will help a lot scoring high in Std 12 board exam and Pre Medical Tests. If you find our videos and our content a great help, guidance and support, kindly donate generously by following the “Paytm” link given below. http://p-y.tm/zU5pf6Ms We invest hours in writing, editing, producing, publishing and managing “Concept Tutorial” YouTube Channel. We use these donations to meet our costs. Our channel offers knowledge, authentic and original student friendly content and detailed information to our audience. Thank you! Concept Tutorial………empowering students with competitive aptitude Concept Tutorial presents ‘Lac Operon’ in very simple language to help students in the best possible way. Please Note: If the medium contains both glucose and lactose then bacteria will utilize glucose first and lac operon remains off till glucose is available. For all organisms on the earth, glucose is the first choice of source of energy. Contents of the video: Types of Genes 00:04 Transcription Unit & its types 00:53 Operon & its Components 3:12 Lac Operon 5:00 Lac Operon- Switch off 6:42 Lac Operon- Switch on 9:38 You might find following topics useful: Structure of DNA https://youtu.be/UBdYz1cu71s What is gene https://www.youtube.com/watch?v=nJk_zvs96bM Nucleosome https://youtu.be/_oo-3tRqMqk DNA Replication https://www.youtube.com/watch?v=Pq7hrY9fNpk Transcription https://www.youtube.com/watch?v=tIr4M0NonU4 Translation https://www.youtube.com/watch?v=o8oYINBHC9U Share this video https://youtu.be/XNARxh_p8m4
Views: 60864 Concept Tutorial
04 The Transcriptional Regulation of Gene Expression in Eukaryotes
 
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Video Index. Basic Mechanisms of Eukaryotic Transcriptional Activation 4m12s Positive Regulation of Eukaryotic Promoters 23m43s Combinatorial Control of Gene Expression (galactose genes) 47m48s Combinatorial Control of Gene Expression (Yeast MAT locus) 58m13s Combinatorial Mixtures of Heterodimers Regulate Transcription 1h9m29s Differentiation Requires Extensive Use of Combinatorial Control 1h15m25s Insulators and gene silencing 1h34m37s Steroid Hormone receptors are transcription activators (recap) 1h40m50s
Views: 19200 Mark Temple
Signal Transmission and Gene Expression
 
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032 - Signal Transmission and Gene Expression Paul Andersen explains how signal transmission is used to alter both cellular function and gene expression. He uses the example of epinephrine release in humans and how it is used in the fight or flight response. Epinephrine causes liver cells to release glucose that is normally stored as glycogen when they receive the signal of epinephrine. They are also able to create different enzymes when receiving this signal. The signal transduction pathway and the importance of CyclicAMP is included. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ All of the images are licensed under creative commons and public domain licensing: Animal Cell Clip Art, n.d. http://www.clker.com/clipart-animal-cell.html. DNA, n.d. http://openclipart.org/detail/58543/dna-by-kumar35885. "File:D-Glucose-Chain-3D-Balls.png." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:D-glucose-chain-3D-balls.png. "File:Epinephrine-3d-CPK.png." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Epinephrine-3d-CPK.png. "File:Phospholipids Aqueous Solution Structures.svg." Wikipedia, the Free Encyclopedia. Accessed December 1, 2013. http://en.wikipedia.org/wiki/File:Phospholipids_aqueous_solution_structures.svg. Häggström, Created and released to the public domain for the sake of free knowledge to all mankind by Mikael. Svg File Which Can Be Dragged and Dropped Together with Other Parts., January 18, 2008. Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. http://commons.wikimedia.org/wiki/File:Liver.svg. Holubeck, Barry. English: Joby Ogwyn Making the First Wingsuit Flight next to the North Face of the Matterhorn., July 2009. Own work. http://commons.wikimedia.org/wiki/File:Matterhorn_JOBY.jpeg. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Views: 164749 Bozeman Science
Gene expression بالعربى
 
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Views: 11419 Concept
Gene Silencing by microRNAs
 
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MicroRNAs are a class of small, non-coding RNA molecules that regulate gene expression and have a big impact on many biological processes. This medical 3D animation shows the biogenesis and function of microRNAs within the cell. The goal of the project was to arouse interest by presenting the topic of gene silencing in a simplified and visually appealing way. It was part of my master`s graduation project where I had the opportunity to combine my two different studies Information Design and Molecular Biology. For schools and universities: If you want to embed the video on your site, please write my website http://www.katharinapetsche.com as a credit under the video. Thank you! Companies: If you want to use this video commercially, please get in contact: [email protected] CREDITS: Concept, Design, Animation: Katharina Petsche http://www.katharinapetsche.com Narrator: Steve Crilley Music: "Mutations" by Small Collin www.smallcolin.com
Views: 175370 Katharina Petsche
Gene Regulation and the Lac Operon
 
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Donate here: http://www.aklectures.com/donate.php Website video link: http://www.aklectures.com/lecture/gene-regulation-and-the-lac-operon Facebook link: https://www.facebook.com/aklectures Website link: http://www.aklectures.com
Views: 80541 AK LECTURES
Biol 360 Tutorial General Positive Negative gene regulation
 
04:35
Made with Explain Everything
Views: 3185 Cindy Malone
Regulation of Gene Expression
 
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Biology_b-chrom-dna-33.mp4
Views: 1798 Sabaq. Pk
Chapter 18, Eukaryotic Control of Gene Expression
 
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This segment looks at the various means eukaryotic cells use to control protein production.
Views: 34663 rocketsgeneralbio
Lac Operon, Regulation of Gene Expression | A-level Biology | OCR, AQA, Edexcel
 
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https://goo.gl/31T06Y to unlock the full series of AS, A2 & A-level Biology videos created by A* students for the new OCR, AQA and Edexcel specification. In this video we will go through how the Lac operon works before discussing how transcription factors control rates of transcription including the role of hormones such as oestrogen, post-transcriptional regulation involving processes like splicing and post-translational regulation through activating proteins.
Views: 2430 SnapRevise
Difference between Prokaryotic and Eukaryotic Gene Expression
 
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Prokaryotic gene expression vs eukaryotic gene expression - This lecture explains about the difference between Prokaryotic and Eukaryotic gene expression. Prokaryotic gene expression is simple and it occurs in the cytoplasm of the cell including DNA Replication, transcription and translation while gene expression in eukaryotes are complex and it contains several stages. The process of DNA Replication takes place inside the nucleus but the protein synthesis takes place in Cytosol. Eukaryotic RNA is modified by polyadenylation and splicing prior to the protein synthesis and it is regulated in several different levels. While the Prokaryotic gene expression is regulated by the Operon concept while the expression of genes regulated by a single promoter and operator gene. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching the gene expression video.
Views: 50118 Shomu's Biology
Dr.Abbas 18 [ DNA : Regulation of gene expression in eukaryotes - Translation ( Genetic Code ) ]
 
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- Regulation of gene expression in eukaryotes - Translation ( Genetic Code ) - Characters of genetic code