Download or read book RNA World Hypothesis and the Origin of Life Astrochemistry Perspective written by Ashraf - Ali and published by Frontiers Media SA. This book was released on 2022-09-26 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Evolution and the Origin of Life written by Horst Rauchfuss and published by Springer Science & Business Media. This book was released on 2008-10-15 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: How did life begin on the early Earth? We know that life today is driven by the universal laws of chemistry and physics. By applying these laws over the past ?fty years, en- mous progress has been made in understanding the molecular mechanisms that are the foundations of the living state. For instance, just a decade ago, the ?rst human genome was published, all three billion base pairs. Using X-ray diffraction data from crystals, we can see how an enzyme molecule or a photosynthetic reaction center steps through its catalytic function. We can even visualize a ribosome, central to all life, translate - netic information into a protein. And we are just beginning to understand how molecular interactions regulate thousands of simultaneous reactions that continuously occur even in the simplest forms of life. New words have appeared that give a sense of this wealth of knowledge: The genome, the proteome, the metabolome, the interactome. But we can’t be too smug. We must avoid the mistake of the physicist who, as the twentieth century began, stated con?dently that we knew all there was to know about physics, that science just needed to clean up a few dusty corners. Then came relativity, quantum theory, the Big Bang, and now dark matter, dark energy and string theory. Similarly in the life sciences, the more we learn, the better we understand how little we really know. There remains a vast landscape to explore, with great questions remaining.
Download or read book Origin of Life via Archaea written by Richard Gordon and published by John Wiley & Sons. This book was released on 2024-08-26 with total page 1190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book surveys the models for the origin of life and presents a new model starting with shaped droplets and ending with life as polygonal Archaea; it collects the most published micrographs of Archaea (discovered only in 1977), which support this conclusion, and thus provides the first visual survey of Archaea. Origin of Life via Archaea’s purpose is to add a new hypothesis on what are called “shaped droplets”, as the starting point, for flat, polygonal Archaea, supporting the Vesicles First hypothesis. The book contains over 6000 distinct references and micrographs of 440 extant species of Archaea, 41% of which exhibit polygonal phenotypes. It surveys the intellectual battleground of the many ideas of the origin of life on earth, chemical equilibrium, autocatalysis, and biotic polymers. This book contains 17 chapters, some coauthored, on a wide range of topics on the origin of life, including Archaea’s origin, patterns, and species. It shows how various aspects of the origin of life may have occurred at chemical equilibrium, not requiring an energy source, contrary to the general assumption. For the reader’s value, its compendium of Archaea micrographs might also serve many other interesting questions about Archaea. One chapter presents a theory for the shape of flat, polygonal Archaea in terms of the energetics at the surface, edges and corners of the S-layer. Another shows how membrane peptides may have originated. The book also includes a large table of most extant Archaea, that is searchable in the electronic version. It ends with a chapter on problems needing further research. Audience This book will be used by astrobiologists, origin of life biologists, physicists of small systems, geologists, biochemists, theoretical and vesicle chemists.
Download or read book Conflicting Models for the Origin of Life written by Stoyan K. Smoukov and published by John Wiley & Sons. This book was released on 2023-03-21 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conflicting Models for the Origin of Life Conflicting Models for the Origin of Life provides a forum to compare and contrast the many hypotheses that have been put forward to explain the origin of life. There is a revolution brewing in the field of Origin of Life: in the process of trying to figure out how Life started, many researchers believe there is an impending second creation of life, not necessarily biological. Up-to-date understanding is needed to prepare us for the technological, and societal changes it would bring. Schrodinger’s 1944 “What is life?” included the insight of an information carrier, which inspired the discovery of the structure of DNA. In “Conflicting Models of the Origin of Life” a selection of the world’s experts are brought together to cover different aspects of the research: from progress towards synthetic life – artificial cells and sub-cellular components, to new definitions of life and the unexpected places life could (have) emerge(d). Chapters also cover fundamental questions of how memory could emerge from memoryless processes, and how we can tell if a molecule may have emerged from life. Similarly, cutting-edge research discusses plausible reactions for the emergence of life both on Earth and on exoplanets. Additional perspectives from geologists, philosophers and even roboticists thinking about the origin of life round out this volume. The text is a state-of-the-art snapshot of the latest developments on the emergence of life, to be used both in graduate classes and by citizen scientists. Audience Researchers in any area of astrobiology, as well as others interested in the origins of life, will find a modern and current review of the field and the current debates and obstacles. This book will clearly illustrate the current state-of-the-art and engage the imagination and creativity of experts across many disciplines.
Download or read book The Emergence of Life on Earth written by Iris Fry and published by Rutgers University Press. This book was released on 2000 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: How did life emerge on Earth? Is there life on other worlds? These questions, until recently confined to the pages of speculative essays and tabloid headlines, are now the subject of legitimate scientific research. This book presents a unique perspective--a combined historical, scientific, and philosophical analysis, which does justice to the complex nature of the subject. The book's first part offers an overview of the main ideas on the origin of life as they developed from antiquity until the twentieth century. The second, more detailed part of the book examines contemporary theories and major debates within the origin-of-life scientific community. Topics include: Aristotle and the Greek atomists' conceptions of the organism Alexander Oparin and J.B.S. Haldane's 1920s breakthrough papers Possible life on Mars?
Download or read book Between Necessity and Probability Searching for the Definition and Origin of Life written by Radu Popa and published by Springer Science & Business Media. This book was released on 2004-02-20 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systematically explores the early origins and basic definition of life. Investigates the major theories of the origins of life in light of modern research with the aim of distinguishing between the necessary and the optional and between deterministic and random influences in the emergence of what we call ‘life.’ Treats and views life as a cosmic phenomenon whose emergence and driving force should be viewed independently from its Earth-bound natural history. Synthesizes all the fundamental life-related developments in a comprehensive scenario, and makes the argument that understanding life in its broadest context requires a material-independent perspective that identifies its essential fingerprints
Download or read book The Origin of Life written by John Desmond Bernal and published by . This book was released on 1967 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Origin of Life Insights from Computational Models written by Suvam Roy and published by . This book was released on 2024-01-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origin of life on this earth is as yet an unsolved mystery for scientists since the processes and pathways that lead from basic chemical building blocks to self- replicating cells are not yet clearly understood. Explaining the emergence and even- tual proliferation of large functional biomolecules in the absence of catalysts has been a long-standing hurdle in this regard. Such biomolecules must have preceded the Last Universal Common Ancestor (LUCA) of all living organisms, that was com- posed of DNA (for information storage) and proteins (for regulation and catalysis). Emergence of functional biomolecules however, is only the first step in the origin of life. Formation of protocellular compartments, emergence of functional biomolecules inside those compartments, and subsequent evolution of the protocellular popula- tions towards increasing functional diversity, were all events that had to precede the emergence of the earliest cells that appeared around 3.8 billion years ago. Need- less to say, we do not have a proper explanation for these later stages as well, that involves compartmentalised evolution. Now, going back to the earliest phase, an interesting hypothesis known as the RNA World Hypothesis, suggests that the first functional bio-molecules are likely to have evolved in an RNA world where RNA played the roles of information storage, catalysis, and regulation. This hypothesis proposes that RNA came before DNA and proteins as it has a simpler structure and the present DNA-protein world is thought to have evolved from this RNA world. Conceptualized first by Alexander Rich in 1962 [1] and coined by Walter Gilbert in 1986 [2], this hypothesis is mainly based on the experimental facts that RNA can store information and show enzymatic activities. RNA can also show regulatory activities like proteins and replicate like DNA. In the following, we provide a brief history of these experimental developments, followed by the shortcomings of the RNA world hypothesis. The papers presented in this thesis were an attempt to address those shortcomings and suggest plausible ways in which evolution in the earliest epochs eventually led to the origin of life.
Download or read book Chirality and Life written by Rolf M. Flügel and published by Springer Science & Business Media. This book was released on 2011-01-11 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the fascinating formation of the first simple bioorganic molecules and describes the hidden aspects of chiral compounds, which raise questions on the molecular beginnings of life. The occurrences of extraterrestrial, non-standard amino acids in meteorites are dealt with in detail, as well as their subsequent transfer to proteinogenic amino acids. The concept of asymmetric organo-catalysis for the synthesis of carbohydrates and ribonucleosides are considered. The notion of a single amino acid that functions as an enzyme is developed. Attempts to simulate ancient world scenarios are critically reviewed. There is a special focus on ribozymes and the resulting RNA world. Combinations of different world scenarios are discussed in view of an on-going evolution. The currently most plausible hypotheses and visions of ancient world scenarios that led to today’s DNA world are also provided. Included is a pre-cellular world of viruses that is presented for the first time.
Download or read book The Origins of Life and the Universe written by Paul F. Lurquin and published by Columbia University Press. This book was released on 2003 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Because his undergraduate course Origins of Life was so popular, and because there is so much discussion of the matter in both religious and scientific realms, biochemist Lurquin thought that the general public might by interested as well in a synopsis and synthesis of the current thinking. So he revised his course notes for lay readers, to demonstrate that the logic of science can be used to make deep sense of the world from the creation of the universe to the creation of life and its diversification. Annotation (c)2003 Book News, Inc., Portland, OR (booknews.com).
Download or read book The Molecular Origins of Life written by André Brack and published by Cambridge University Press. This book was released on 1998-12-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 199 book reviews discoveries in astronomy, paleontology, biology and chemistry to help us to understand the likely origin of life on Earth.
Download or read book Prebiotic Chemistry and the Origin of Life written by Anna Neubeck and published by Springer Nature. This book was released on 2022-01-03 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an overview of current views on the origin of life and its earliest evolution. Each chapter describes key processes, environments and transition on the long road from geochemistry and astrochemistry to biochemistry and finally to the ancestors of today ́s organisms. This book combines the bottom-up and the top-down approaches to life including the origin of key chemical and structural features of living cells and the nature of abiotic factors that shaped these features in primordial environments. The book provides an overview of the topic as well as its state of the art for graduate students and newcomers to the field. It also serves as a reference for researchers in origins of life on Earth and beyond.
Download or read book Genesis In The Beginning written by Joseph Seckbach and published by Springer Science & Business Media. This book was released on 2012-03-21 with total page 911 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genesis – In The Beginning deals with the origin and diversity of Life and early biological evolution and discusses the question of where (hot or cold sources) and when the beginning of Life took place. Among the sections are chapters dealing with prebiotic chemical processes and considering self-replication of polymers in mineral habitats. One chapter is dedicated to the photobiological regime on early Earth and the emergence of Life. This volume covers the role of symmetry, information and order (homochrial biomolecules) in the beginning of Life. The models of protocells and the genetic code with gene transfer are important topics in this volume. Three chapters discuss the Panspermia hypothesis (to answer “Are we from outer Space?”). Other chapters cover the Astrobiological aspects of Life in the Universe in extraterrestrial Planets of the Solar System and deal with cometary hydrosphere (and its connection to Earth). We conclude with the history and frontiers of Astrobiogy.
Download or read book The Origin of Life on the Earth written by Aleksandr Ivanovich Oparin and published by . This book was released on 1957 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prebiotic Chemistry written by Peter Walde and published by Springer Science & Business Media. This book was released on 2005-10-13 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Genomic Potential Hypothesis written by Christian Schwabe and published by CRC Press. This book was released on 2001-08-01 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Genomic Potential Hypothesis is a biochemist's view of the origin, evolution, and development of life. Large numbers are second nature to a biochemist and though he rarely ever thinks of it explicitly, the concept of mass action is a part of the definition of chemistry. The origin of life, from that perspective, will turn into an event that occ
Download or read book The Emergence of Life written by Pier Luigi Luisi and published by Cambridge University Press. This book was released on 2016-09-15 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing the emergence of life from a systems biology perspective, this new edition has undergone extensive revision, reflecting changes in scientific understanding and evolution of thought on the question 'what is life?'. With an emphasis on the philosophical aspects of science, including the epistemic features of modern synthetic biology, and also providing an updated view of the autopoiesis/cognition theory, the book gives an exhaustive treatment of the biophysical properties of vesicles, seen as the beginning of the 'road map' to the minimal cell - a road map which will develop into the question of whether and to what extent synthetic biology will be capable of making minimal life in the laboratory. Fully illustrated, accessibly written, directly challenging the reader with provocative questions, offering suggestions for research proposals, and including dialogues with contemporary authors such as Humberto Maturana, Albert Eschenmoser and Harold Morowitz, this is an ideal resource for researchers and students across fields including bioengineering, evolutionary biology, molecular biology, chemistry and chemical engineering.
