00:01
Why would dna not be the first self -replicating molecule? why rna? so rna has more diverse priorities than dna.
00:12
Dna has a very standard structure, the double helix that you always find.
00:18
Dna is always a double helix, whereas rna can have more complex shapes based on its base sequence.
00:27
So more like a protein's structure is dependent on its amino molecule.
00:31
Sequence.
00:35
And rna structures can have catalytic activity and have catalytic activity.
00:47
So you can have an rna that has catalytic activity.
00:53
You can also have a ribozyme, which is rna plus protein, but has catalytic activity.
00:59
And we still have some of these.
01:00
We have ribosomes, for example, which are rna plus protein performing roles.
01:07
So this is the feature that makes people propose that the first self -replicating biomolecule would be made of rna, because dna doesn't have catalytic activity...