Ah so we don't get to ask you what your OP means without being insulted?
This is a paper I've read before, and it doesn't answer what I asked you, so I'm not going to waste my time trying to sort out what the hell you expect posters to say to you.
You didn't define "produce", so I'll refer you to the calderas of Yellowstone for all the cytosine needed to keep living cells healthy and prosperous at boiling temperatures. I guess you're the wise guy so you can figure out how to harvest it.
Thermus aquaticus.
You'll need to work with it indirectly anyway when you get to the step of proving life does not exist on Earth as claimed by mad scientists who are out to bring New World Order in to subjugate the religions. That kind of proof will at least leave you doing PCR analysis, hence the above microbe kills two birdbrains with one stone.
In the mean time you can tell your creationist buddies who are quote mining science to try to shore up religious pseudoscience that no one has any idea of the abundance of prebiotic cytosine so it doesn't matter how fast it degenerates. If it only lasted one nanosecond and there were 100 yotta moles per nanosecond being manufactured near some thermal vent at one of the poles, where they are instantly chilled and preserved for a 100 million years each, who cares? Your point is to make some lame excuse for propping up superstition, isn't it? Just lace up and try to be candid for once in you propagandizing life. Tell it, but at least TRY to be honest. Or at least put the face on if you can't bear the indignity of being reminded how badly you fared in school. That will take a lot more than finally learning Tex and copying a bunch of meaningless formulas into another irrelevant diatribe against relativity. But you'll feel better when it's over. And readers will be elated.
:spank:
1) I read your link. It does not mention cytosine. Further, the hotter, the quicker cytosine breaks down. So, you link is useless for many reasons.
2) I am not here to prove one theory or another. I am simply pointing out that RNA replication is not the pathway. Obviously, there is some valid pathway.
Oh, are you here to prove a particular opinion/religion?