RNA World Update

[Mercer (John Mercer)]

@Rumraket

@theaz101

Since I think that Peptidyl transferase fails as evidence for RNA World

The fact that ribosomes are transcribed from DNA doesn’t mean it isn’t evidence for the RNA world hypothesis.

You seem to confuse evidence with proof.

True, but you both seem to be missing the fact that the nature of PT was predicted before it was known. That makes it significant evidence, regardless of anyone’s post hoc thinking about it.

@Nesslig20

@theaz101

2. rRNA is cut into several separate RNA strands by proteins.

Not always. Sometimes the introns are able to fold into a structure which catalyzes their own splicing. For example, Group I and II introns (The spliceosome likely evolved from these). The nobel prize winning discovery by Cech’s lab in 1981 (previously alluded to by @Rumraket) of a pre-rRNA that was able to splice out an intron even in the absence of proteins was among the first experimental demonstrations of ribozymes.

This is another empirical fact that is routinely concealed by the IDcreationists whose hearsay @theaz101 is basing his opinions on.

So one has to ask, if this isn’t convincing evidence, why conceal it from @theaz101? This is not obscure stuff, as both findings won Nobels.

And yet again, @theaz101’s hypothesis has made another false empirical, perfectly objective prediction (presented as fact).

@Nesslig20

Well, one can make a good argument that all life STILL is “RNA based”

The most important point.

Other questions:

1. Why is translation initiated by a tRNA, but terminated by proteins?
2. Why have tRNAs at all, when it’s trivial to evolve proteins that bind specific DNA sequences in the lab?
3. While all proteins are synthesized beginning with methionine, what proportion of functional proteins retain it?

All of these questions are addressed by the RNA World hypothesis. IDcreationists can’t even muster a design explanation after the fact.