rakuenso Posted May 13, 2005 Share Posted May 13, 2005 ribosomes or RNA? i'm just confused right now. Link to comment Share on other sites More sharing options...
Bluenoise Posted May 13, 2005 Share Posted May 13, 2005 Well seeing as how ribosomes contain RNA, RNA came first. Link to comment Share on other sites More sharing options...
hyebeh Posted May 13, 2005 Share Posted May 13, 2005 yeah... RNA is theorized to be the first molecule capable of storing genetic data. Link to comment Share on other sites More sharing options...
dsjgenius Posted May 15, 2005 Share Posted May 15, 2005 i guess RNA but the more important question here should be did rRNA come first or was it another type of RNA or ribosomes Link to comment Share on other sites More sharing options...
uncool Posted May 15, 2005 Share Posted May 15, 2005 RNA is able to synthesize itself, so it does not need the ribosomes. Also, there is RNA in prokaryotic organisms, which don't have ribosomes, so the RNA must have come first. -Uncool- Link to comment Share on other sites More sharing options...
rakuenso Posted May 15, 2005 Author Share Posted May 15, 2005 RNA is able to synthesize itself' date=' so it does not need the ribosomes.-Uncool-[/quote'] mind elaborating? Link to comment Share on other sites More sharing options...
Ophiolite Posted May 15, 2005 Share Posted May 15, 2005 Just thinking out loud: RNA probably preceded DNA, functioning as a self replicating system. When (and however)DNA came on the scene , the RNA was coerced into its various current roles, including facilitating protein synthethis in ribosomes. The ribosomes would look pretty silly w/out DNA, so I vote for RNA first. Link to comment Share on other sites More sharing options...
donkey Posted May 17, 2005 Share Posted May 17, 2005 mind elaborating? I think he's talking about the RNA world hypothesis. Basically the theory suggests that RNA - which is known to have some catalytic activity as well as, of course, genetic storage capabilities - was the precursor molecule at the origin of life. It has been suggested that RNA molecules could use itself as a template and catalyse the duplication of itself. Then DNA and proteins came along and took over the storage and catalytic roles of RNA, religating it to a messenger and a few other niche roles. see here for details: http://en.wikipedia.org/wiki/RNA_world_hypothesis Link to comment Share on other sites More sharing options...
aaronmyung Posted May 18, 2005 Share Posted May 18, 2005 I have no idea what you are talking about, but it sounds ultra interesting. I'm off to study it now Hopefully I can come back soon and say something constructive Link to comment Share on other sites More sharing options...
Skye Posted May 18, 2005 Share Posted May 18, 2005 Also, there is RNA in prokaryotic organisms, which don't have ribosomes, so the RNA must have come first. Prokaryotes have ribosomes. Link to comment Share on other sites More sharing options...
aaronmyung Posted May 18, 2005 Share Posted May 18, 2005 I second what Skye said, as if you wouldn't know that Prokaryotes have ribosomes. Link to comment Share on other sites More sharing options...
Skye Posted May 18, 2005 Share Posted May 18, 2005 There's no need to be smug though, everyone makes mistakes. Link to comment Share on other sites More sharing options...
aaronmyung Posted May 18, 2005 Share Posted May 18, 2005 I was kidding buddy I dont know anything about this lol Read sig mate, I'm 16 Link to comment Share on other sites More sharing options...
aaronmyung Posted May 18, 2005 Share Posted May 18, 2005 sorry if I came out rude Link to comment Share on other sites More sharing options...
rakuenso Posted May 19, 2005 Author Share Posted May 19, 2005 .......... thx for the wiki link Link to comment Share on other sites More sharing options...
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