Talk:RNA world

From EvoWiki

Hi, well, the main point here is why does rna need to do the next step to dna and proteins if it can do all of the functions?

Several things can do it. Those who do it best, supersede the others. DNA and proteins can do their own thing better than RNA does. --tk (t) 09:45, 24 Aug 2005 (BST)

The instability of RNA is an advantage as the system became more complex. mXNA's ("messengers", whether DNA or RNA) would have to be degraded after translation to protein. The process that performs this, gone awry, could also damage the more permanent repository of genetic information. So, by separating the functions, DNA can be better protected to last a lifetime (as it must in human neurons) and mRNA can be short-lived to be responsive to cellular operation. --Dmill96 19:17, 9 March 2006 (GMT)