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Author Topic:   Self-Replicating Molecules - Life's Building Blocks (Part II)
Rahvin
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Posts: 3966
Joined: 07-01-2005


Message 7 of 97 (514170)
07-04-2009 1:11 PM
Reply to: Message 6 by themasterdebator
07-03-2009 10:47 PM


Very impressive post. One question, has anyone been able to show these molecules turning into anything resembling a cell?

That's not the point. The transition from self-replicating molecules to cells is not thought to have been the result in a change in those molecules, but rather an accident of environment much later with the addition of an early cell membrane/wall (most hypotheses I've geard of refer to a spontaneously formed bilipid layer).

For instance, see Wiki's Abiogenesis entry:

quote:
Phospholipids (of an appropriate length) can spontaneously form lipid bilayers, a basic component of the cell membrane.

The so-called "cellular machinery" (mitochondria, etc) is yet another instance of gradual addition from a variety of pathways.

We would be identifying our proto-cell as "life" long before it looked much like a modern cell. The self-replicating molecules are the truly important step, as they allow the process of evolution through natural selection to begin.


This message is a reply to:
 Message 6 by themasterdebator, posted 07-03-2009 10:47 PM themasterdebator has not yet responded

Replies to this message:
 Message 8 by Dr Jack, posted 07-04-2009 1:24 PM Rahvin has not yet responded

  
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