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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! To support this channel and keep up on STEM news at the same time, click on the link below and subscribe to this FREE newsletter: http://www.jdoqocy.com/click-9021241-13591026 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
Views: 172336 Professor Dave Explains
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: 284379 khanacademymedicine
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: 1258602 Bozeman Science
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: 687493 Amoeba Sisters
Regulated Transcription
 
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NDSU Virtual Cell Animations Project animation "Regulated Transcription". For more information please see http://vcell.ndsu.edu/animations. Gene expression is controlled in many different ways. When proteins from outside a cell signal for a specific gene to be transcribed, it is known as regulated transcription. This animation illustrates how a protein like insulin can trigger a regulated transcription event, in addition to setting off the signal pathway illustrated in our Insulin Signaling video.
Views: 255619 ndsuvirtualcell
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: 182109 Shomu's Biology
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: 148088 AK LECTURES
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: 111378 Shomu's Biology
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: 180645 Khan Academy
Transcription Factors | A-Level Biology Tutorial | Tailored Tutors
 
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Transcription Factors explained in just a few minutes by Rich Thompson from Tailored Tutors. Watch, understand, and summarize these notes in your own revision. This video is from The Ultimate Guide To A-Level Biology - a super condensed, exam focused supplemental revision course that covers all of the new AQA, OCR, and Edexcel specification. Improve a grade in your A-Level Biology, Chemistry, or Maths course guaranteed at http://tailoredtutors.co.uk Follow us on instagram for revision tips and behind the scenes stories! instagr.am/tailoredtutors
Views: 23273 Tailored Tutors
Lac operon
 
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Overview of gene regulation in the Lac operon. Discussion of CAP, cAMP, lac repressor and allolactose in regulation of lac operon.
Views: 401934 Khan Academy
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: 1401297 ndsuvirtualcell
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: 140639 khanacademymedicine
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: 102915 AK LECTURES
Biol 360 Tutorial General Positive Negative gene regulation
 
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Made with Explain Everything
Views: 4176 Cindy Malone
GENETICS 3: GENE REGULATION: POST-TRANSCRIPTIONAL REGULATION
 
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GENE REGULATION: POST-TRANSCRIPTIONAL REGULATION
Views: 4668 Walter Jahn
Biology: Gene Expression-Transcription
 
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Transcription
Views: 15802 Doc Ron Bio
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: 19858 Mark Temple
A2 Biology - Transcriptional control of gene expression (OCR A Chapter 19.2)
 
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Here we'll be looking at the first level of gene expression regulation in eukaryotes, which is before transcription. The principle of this stage is to switch genes on or off, and this is decided by whether or not the RNA polymerase is allowed to bind to the gene for transcription to happen. This is dependent on the state of the chromatin which is altered by histone modification - if the histones are less positively charged (ie. more negative), the DNA will become less tightly wound around it, allowing the gene to become accessible to the RNA polymerase for transcription. Please subscribe for more content and comment below to let me know what you think! :) Facebook: BioRach - A-level Biology Online https://www.facebook.com/biorachproject/ Twitter: @BioRachProject https://twitter.com/BioRachProject?lang=zh-tw Background music: Infinite Perspective by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1500024 Artist: http://incompetech.com/
Views: 4355 BioRach
Introduction to gene regulation - Robert Tjian (Berkeley/HHMI)
 
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https://www.ibiology.org/genetics-and-gene-regulation/transcription-factors/ General introduction of the central dogma, transcription and how it relates to gene regulation.
Views: 2715 iBiology Techniques
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: 327513 Blair Lyons
Transcriptional Regulation in Eukaryotes
 
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Animation describing 5 processes involved in transcription regulation: - Transcription initiation - Chromatin Re-modelling - Genomic Imprinting - RNA interference using microRNA's - Regulation of Transcription by Steroid Hormones
Views: 3096 Joseph Cavell
Post-transcriptional Regulation of Gene Expression.mp4
 
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Video was created for a non-majors introductory biology student audience. It provides a broad overview of post-transcriptional mechanisms of gene regulation, with particular focus on alternative splicing, and protein processing/modification.
Views: 11198 sbbiovideos
Regulation of Gene Expression in Development.mp4
 
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Video was created for a non-majors introductory biology student audience. It provides an introduction to the concept of a combinatorial transcriptional code regulating gene expression patterns in specific cell types and an overview of the early steps of human development. In addition, it provides an introduction to the evolutionarily conserved homeotic genes that are critical regulators of key developmental processes across species.
Views: 3374 sbbiovideos
OPERON model (regulation of gene expression)
 
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Join my live classes (Complete package) on Unacademy plus. Best classes at very nominal fee structure. USE REFERRAL CODE: 'BIOLOGYBYPKAGRAWAL' to get 10% discount exclusively. Link to Join: https://unacademy.com/plus/course/arise-for-droppers-neetaiims-2020-batch-b/NKN0ON9N Limited Seats!!! Hurry!!! Also get Physics and Chemistry by top Educators in the same subscription fee. Complete Physics, Chemistry, Biology for NEET/AIIMS. Batch for Droppers.
Views: 88765 BIOLOGY BY P K AGRAWAL
Transcription Factors & Promoter Region.
 
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Transcription Factors & Promoter Region. This is a teaser video. Watch the complete lecture in the member's area at https://www.DrNajeebLectures.com Transcription factor (TF) (or sequence-specific DNA-binding factor) is a protein that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence. In genetics, a promoter is a region of DNA that initiates transcription of a particular gene. Promoters are located near the transcription start sites of genes, on the same strand and upstream on the DNA (towards the 3' region of the anti-sense strand). Promoters can be about 100–1000 base pairs long. ─────────────── DR. NAJEEB LECTURES ─────────────── Dr. Najeeb Lectures are the World's Most Popular Medical Lectures. Over 1 Million+ students from 190 countries trust Dr. Najeeb Lectures to Master Medical Sciences. Sign up for a membership plan on our website and access 800+ videos on Basic Medical Sciences & Clinical Medicine. ───────────────── OUR YOUTUBE CHANNEL ───────────────── Here on YouTube, we only upload free sample videos. Most of them are teaser videos (not complete lectures). If you like these videos you can check out our entire video library on our website at https://www.DrNajeebLectures.com. ────────────────────── WHY SIGN UP FOR MEMBERSHIP? ────────────────────── ► 800+ Medical Lectures. ► Basic Medical Sciences. ► Clinical Medicine. ► New videos every week in HD. ► Download videos for offline access. ► Fast video playback (0.5x - 2x) ► Watch videos on any device. ► Fanatic customer support. ► Trusted by 1 Million+ students. Learn more at https://www.DrNajeebLectures.com
Views: 29034 Dr. Najeeb Lectures
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
Gene Expression: Transcription & Translation
 
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By McGraw Hill Publication's
Views: 18322 The Optimized Brain
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: 354878 Shomu's Biology
Transcription Factors - Robert Tjian (Berkeley/HHMI)
 
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https://www.ibiology.org/genetics-and-gene-regulation/transcription-factors/ Introduction to the regulatory regions and the transcription factors that bind to these regions.
Views: 5019 iBiology Techniques
Transcription regulation
 
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In this animation, we explore the ways in which the expression of genes can be regulated. http://ukcatalogue.oup.com/product/9780199658572.do
Control of Gene Expression
 
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Examines transcriptional, post transcriptional, translational, and post translational control over protein synthesis.
Views: 16978 knowwhatuknow41
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: 35834 Bo-Sung Kim
Enhancers and activators for eukaryotic gene regulation
 
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Enhancers and activators for eukaryotic gene regulation
Views: 34450 HeyNow1003
Eukaryotic Transcription Regulation
 
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00:00 Introduction 00:45 Transcription activation in eukaryotes: galactose utilization pathway 03:00 GAL4 03:59 GAL80 05:25 GAL3 08:12 For next class
Views: 1194 Joseph Ross
A2 Biology - Post-transcriptional control of gene expression (OCR A Chapter 19.2)
 
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The second level of gene expression regulation is after transcription, where the pre-mRNA is edited for translation. There are a few steps that can be done: RNA splicing to remove introns (saving time and resources), adding a cap and poly-adenine tail (to stablise RNA) and RNA editing (to produce proteins of different structures and functions). Here we'll have a look at these processes. Please subscribe for more content and comment below to let me know what you think! :) Facebook: BioRach - A-level Biology Online https://www.facebook.com/biorachproject/ Twitter: @BioRachProject https://twitter.com/BioRachProject?lang=zh-tw Background music: Enchanted Journey by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100799 Artist: http://incompetech.com/
Views: 2927 BioRach
Transcriptional regulation : Enhancers
 
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This video describes how enhancer elements can regulate transcription from a particular promoter of a gene.
Regulation of gene expression
 
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An overview of the way in which cells control which genes are expressed Credits: Types of control diagram: Essential Cell Biology by Alberts Gene regulatory protein graphics: Molecular Biology of the Cell by Alberts Transcriptional control graphic: http://classconnection.s3.amazonaws.com/664/flashcards/1813664/jpg/41347162225303.jpg Alternative splicing graphic: http://en.wikipedia.org/wiki/Alternative_splicing Translational control: http://en.wikipedia.org/wiki/Eukaryotic_translation
Views: 2790 JHU MolCell
Gene Expression
 
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A video by Genome British Columbia demonstrating gene expression www.genomicseducation.ca
Views: 515461 Genome BC
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: 113869 BleierBiology
Prokaryotic Transcription Regulation
 
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00:00 Introduction and goal 00:36 Lac operon normal function 04:44 Allosteric regulation of Lac repressor by lactose 07:40 Nomenclature for genetic interactions 08:53 How mutations impact Lac operon regulation 10:01 Oc (operator: constitutive) mutation 12:21 LacI- (lac repressor) mutation 14:06 LacIs (lac super-repressor) mutation
Views: 841 Joseph Ross
A2 Biology - Translational and post-translational gene expression control (OCR A Chapter 19.2)
 
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After transcriptional and post-transcriptional control of gene expression to make a mature mRNA, the cell then decides whether or not it can undergo translation and also modify the polypeptide made to change its functions. In this video we will have a look at these processes. Please subscribe for more content and comment below to let me know what you think! :) Facebook: BioRach - A-level Biology Online https://www.facebook.com/biorachproject/ Twitter: @BioRachProject https://twitter.com/BioRachProject?lang=zh-tw Background music: Cylinder Two by Chris Zabriskie is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://chriszabriskie.com/cylinders/ Artist: http://chriszabriskie.com/
Views: 2640 BioRach
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: 34619 Moof University