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04/28/05

Permalinkby 03:03:43 pm, Categories: Literature - Articles, 310 words   English (US)

Chance and necessity do not explain the origin of life

Cell Biology International
Volume 28, Issue 11 , November 2004, Pages 729-739

Copyright © 2004 International Federation for Cell Biology Published by Elsevier Ltd.
Chance and necessity do not explain the origin of life

J.T. Trevors(a) and D.L. Abel(b)

(a)Laboratory of Microbial Technology, Department of Environmental Biology, Room 3220, Bovey Building, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
(b)The Gene Emergence Project, The Origin-of-Life Foundation Inc., 113 Hedgewood Dr., Greenbelt, MD 20770-1610, USA

Received 8 April 2004; revised 19 May 2004; accepted 24 June 2004. Available online 17 November 2004.

Abstract
Where and how did the complex genetic instruction set programmed into DNA come into existence? The genetic set may have arisen elsewhere and was transported to the Earth. If not, it arose on the Earth, and became the genetic code in a previous lifeless, physical–chemical world. Even if RNA or DNA were inserted into a lifeless world, they would not contain any genetic instructions unless each nucleotide selection in the sequence was programmed for function. Even then, a predetermined communication system would have had to be in place for any message to be understood at the destination. Transcription and translation would not necessarily have been needed in an RNA world. Ribozymes could have accomplished some of the simpler functions of current protein enzymes. Templating of single RNA strands followed by retemplating back to a sense strand could have occurred. But this process does not explain the derivation of “sense” in any strand. “Sense” means algorithmic function achieved through sequences of certain decision-node switch-settings. These particular primary structures determine secondary and tertiary structures. Each sequence determines minimum-free-energy folding propensities, binding site specificity, and function. Minimal metabolism would be needed for cells to be capable of growth and division. All known metabolism is cybernetic – that is, it is programmatically and algorithmically organized and controlled.

Keywords: Cellular communication; Chance; Necessity; Genetic control; DNA; RNA; Evolution; Information theory; Life origin; Astrobiology; Panspermia

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