The transition from the chemical to the biological evolution in the origin of life. Fifth Biren Roy Trust Lecture of the Indian Physical Society

| March 22, 2015 | 0 Comments

P M BHARGAVA

Published in: Physics Teacher, April-June 1990, 61-73.

Abstract:

Perhaps the most important unsolved problem in the area of origin of life is the problem of transition from chemical evolution to biological evolution-that is, how the first cell on which Darwinian biological evolution could have operated, was formed from the end products of chemical evolution. For any viable attempt to understand the nature of this transition it is obviously important to define the beginning point and the end point. A great deal can today be surmised in regard to the beginning point, that is the. end-products or the chemical evolution. An attempt will be made in the first part of the talk to define the ‘end point’ -that is, the criteria that the first cell must have satisfied. It would be argued that these criteria must have been no different from the lowest common denominator or the characteristics of living cells today. It would he pointed out that one of these characteristics is spatial organisation in the soluble phase of the cell; evidence which suggests that various substances do not mix in the soluble phase will be presented. The mechanism or what must be regarded as an apparently non-phase-separated compartmentation in the soluble phase of the cell is still not known. A possible mechanism would be suggested. The need for such compartmentation and the role that it may have played in the origin or life, as we know of it today, will be discussed.

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The transition from the chemical to the biological evolution in the origin of life. Fifth Biren Roy Trust Lecture of the Indian Physical Society. P M BHARGAVA. Physics Teacher, April-June 1990, 61-73.

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