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Life's origins were easier than was thought

hat tRNAs (essential molecules for the synthesis of proteins) are approximately 70 bases long.

The discovery has greatly relaxed the conditions necessary for the first living organisms to develop. "This quantity of genes would be enough for a simple organism to have enough functional activity", according to the researchers. Recent analysis into the minimum number of DNA genes required to constitute bacteria, the most simple organism today, considers that around 200 genes is sufficient. But in riboorganisms there can be much fewer genes, since DNA genomes include a number of genes that have the role of making the RNA translation system (which enables proteins to be produced) work, which would not be required in RNA-based organism.


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Source:Universitat Autonoma de Barcelona


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