Japhia888 said:If you permit, i will quote from my personal virtual library :
http://elshamah.heavenforum.com/origin-of-life-how-did-life-arise-on-earth-f2/rna-and-the-origin-of-life-t106.htm
The immensity of the problem is rarely appreciated by laymen, and is generally ignored by evolutionary scientists, themselves. The simplest form of life imaginable would require hundreds of different kinds of molecules, perhaps thousands, most of them large and very complex. With respect to this point, Van Rensselaer Potter states, "It is possible to hazard a guess that the number is not less than 1,000, but whether it is 3,000 or 10,000 or greater is anyone's guess."2 This statement not only acknowledges the immensity of the problem, but also is a tacit admission of how little is really known or knowable about the problem.
In addition to these many molecules, which would include the large and complex protein, DNA and RNA molecules, each with up to several hundred subunits arranged in a precise sequence, the origin of life would require many complex and dynamically functional structures, such as membranes, ribosomes, mitochondria (or energy-producing complexes of some kind), etc. Furthermore, life requires marvelous coordination in time and space, with many regulatory mechanisms. To believe that all of this came about by mere chemical and physical processes, does indeed constitute an immense exercise of faith.
"the early stages of the RNA world are too complicated to represent plausible scenarios for the origin of life"
"Once RNA is synthesized, it can make new copies of itself only with a great deal of help from the scientist, says Joyce of the Scripps Clinic, an RNA specialist. " It is an inept molecule," he explains, "especially when compared with proteins." Leslie E. Orgel of the Salk Institute for Biological Studies, who has probably done more research exploring the RNA-world scenario than any other scientist, concurs with Joyce. Experiments simulating the early stages of the RNA world are too complicated to represent plausible scenarios for the origin of life, Orgel says. "You have to get an awful lot of things right and nothing wrong," he adds." (Horgan, John [science writer], "In The Beginning ...," Scientific American, February 1991, p.103. Elipses in original).
"not one self-replicating RNA has emerged to date"
"DNA replication is so error-prone that it needs the prior existence of protein enzymes to improve the copying fidelity of a gene-size piece of DNA. `Catch-22,' say Maynard Smith and Szathmary. So, wheel on RNA with its now recognized properties of carrying both informational and enzymatic activity, leading the authors to state: `In essence, the first RNA molecules did not need a protein polymerase to replicate them; they replicated themselves.' Is this a fact or a hope? I would have thought it relevant to point out for 'biologists in general' that not one self-replicating RNA has emerged to date from quadrillions (1024) of artificially synthesized, random RNA sequences." (Dover, Gabriel [Professor of Genetics, University of Leicester], "Looping the evolutionary loop," Review of "The Origins of Life: From the Birth of Life to the Origin of Language," by John Maynard Smith and Eors Szathmary, Oxford University Press: 1999, in Nature, 399, 20 May 1999, pp.217-218)
"tthe RNA world hypothesis is still far from being proved"
"Nevertheless, despite the fact that most scientists working in this field accept the validity of the idea, the RNA world hypothesis is still far from being proved. For one thing, in almost 20 years only seven types of natural ribozymes have been discovered: two remove introns (parts of RNA that don't code for proteins) from themselves; four cut themselves in two; and one trims off the end of an RNA precursor." (Evans J., "It's alive - isn't it?" Chemistry in Britain, Vol. 36, No. 5, May 2000, pp.44-47. http://www.chemsoc.org/chembytes/ezine/2000/evans_may00.htm).
in front of the odds and difficulties, to believe in this scenario constitutes a enormous exercise of faith. What makes you be so credulous in such a improbable scenario ?
If you read my post. Science says it is unknown. However, the theory and hypothesis are alternatives. Just like you asked, I gave an alternative. Do I believe in them no? However, their theory and hypothesis do suggest an explanation.
You have to remember, in science, belief is not a necessity. It also don't claim that this is the one reason or absolute explanation for such. It only gives an interpretation of existing facts - if subjected to the scientific method of which the observation and analysis of the result tend to explain certain phenomenon. It suggests that such is so. It does not say it is so. ^,^