'Rna world' diaporamas de présentation

RNA secondary structure

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Chapter 26

Chapter 26. The Tree of Life: An Introduction to Biological Diversity. Overview: Changing Life on a Changing Earth. Life is a continuum extending from the earliest organisms to the variety of species that exist today Geological events change the course of evolution

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Viruses

Viruses. What is a virus ?. Viruses are submicroscopic, obligate intracellular parasites Morphologically, virus particle is a protein shell, in which the viral genome is enclosed Virus particles are produced from the assembly of pre-formed components and do not grow or undergo division

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The Emergence of Life on Earth: Mystery or Scientific Problem?

The Emergence of Life on Earth: Mystery or Scientific Problem?. Iris Fry The Technion – Israel Institute of Technology. How did life emerge on the ancient earth?. This is one of the most difficult questions still facing science today. Traditional views on the origin of life.

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Prebiotic RNA Synthesis by Montmorillonite Catalysis: Significance of Mineral Salts Prakash C. Joshi New York Center for Astrobiology & Department of Chemistry and Chemical Biology Rensselaer Polytechnic Institute Troy, NY 12180, USA. 1.

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Alan Weiner BIOCHEM 530 Wednesday, EE 037 October 8, 2014 RNA structure and function

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From DNA to Protein

From DNA to Protein. Lecture 14 Pp 229-263. 07_01_Genetic info.jpg. TRANSCRIPTION. TRANSLATION. 07_02_Genes express.jpg. Example A = rapid transcription Example B = slow transcription. 07_03_RNA _v_DNA.jpg. 07_06_Transcription.jpg. 07_07_RNApolymer.jpg. 07_08_Transcript_EM.jpg.

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Liquid Crystal Phases of DNA and Implications for The Origin of Life

Liquid Crystal Phases of DNA and Implications for The Origin of Life. Yang Yang, Xianfeng Song Advisor: Sima Setayeshgar Journal Club April 16 th , 2008. Outline. Part I: Introduction to liquid crystals Part II: Background on theories of origin of life

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Evolution and the Genetic Code

Evolution and the Genetic Code. RNA World to DNA Code. Which came first - proteins or DNA?. Ribozymes: both enzyme and genome RNA world? Later, RNA's functions were taken by DNA & protein RNA was left as a go-between in flow of genetic information

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The modern RNA world:

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Liquid Crystal Phases of DNA and Implications for the origin of life

Liquid Crystal Phases of DNA and Implications for the origin of life. Yang Yang, Xianfeng Song Advisor: Sima Setayeshgar Journal Club April 11 th , 2008. Outline. Part I: Introduction to liquid crystals Part II: Introduction to DNA Part III: Background on theories of origin of life

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RNA Hypothesis

Lecture no. 2. RNA Hypothesis. Lecture no. 2. Life on Earth Probably Began with RNA. Living systems have definable characteristics and requirements. Catalysis and biological information are particularly important requirements for any life form.

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Search for Extraterrestrial Life PHY 100

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Aim: What is the heterotroph hypothesis?

Aim: What is the heterotroph hypothesis?. Early history of life. Solar system~ 12 billion years ago (bya) Earth~ 4.5 bya Life~ 3.5 to 4.0 bya Prokaryotes~ 3.5 to 2.0 bya stromatolites Oxygen accumulation~ 2.7 bya photosynthetic cyanobacteria Eukaryotic life~ 2.1 bya

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Folding of riboswitches during RNA transcription

Folding of riboswitches during RNA transcription. with Ben Sauerwine (Carnegie Mellon, Physics). Background information What are riboswitches? Folding of riboswitch terminators Efficient folding of hairpins Evolution of terminator sequences. Transcription start. Transcription stop.

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AP Biology Unit Test Review Game

AP Biology Unit Test Review Game. Read the statement/phrase below, and match it to the most correct answer from the choices here: Homologous Analogous Convergent Divergent Structures that show no close evolutionary relationship Unrelated species evolve similarly due to environment

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The many roles of RNA

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Chapter 4

Chapter 4. Nucleic Acids and the RNA World. Key Concepts. Nucleotides consist of a sugar, a phosphate group, and a nitrogen-containing base. Ribonucleotides polymerize to form RNA. Deoxyribonucleotides polymerize to form DNA.

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1) The model of life originating on earth is called

1) The model of life originating on earth is called. A) Miller-Urey B) rna world C) Oparin -Haldane D) extra-terrestrial E) lateral gene transfer. 2) ribozymes. A) have genotypes B) have phenotypes C) have both phenotypes and genotypes D) can evolve via natural selection

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A New Course on a Hot Topic!

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