Assembly of Protocells

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Assembly of Protocells

3.9 Billion years ago (+/- 100 million)

The engine gets wrapped in a bubble.

The first battery-powered prototype cells. Inside these fatty acid bubbles, RNA started to act as both a blueprint and a worker.

Between the development of metabolic pathways and the formation of cellular membranes, there might have been a phase involving the assembly of protocells. These protocells, formed from self-assembled lipid molecules creating vesicles, could encapsulate nucleic acids and metabolic molecules, offering a primitive model for cell-like structures. Protocells represent a bridge between non-living chemical systems and the first living cells, showcasing the potential for life-like behaviors without full biological complexity.

Here's the key idea. About 3.9 million years ago RNA-based protocells evolved. Likely with a mix of random DNA experiments.

Finally, the core takeaway. By 3.9 billion years ago, the engine, the self-sustaining chemical reactions, and a container. These membranes prevent diffusion loss, concentrate reactants, and allow heredity to stabilize.

The flashcard inspired by it is this.