which came first?????

[rudeguy]

Protein or DNA?

 

[BurnItDwn]

I'm no biology expert, but I think the most popular theory is that DNA came before protein.
Essentially, DNA may have evolved from something simpler, such as possibly RNA.

 

[destrekor]

Likely protein.
But RNA or a precursor to RNA was likely the first biochemistry molecule chain.
But in all likely hood, the first ones likely both formed separately and merged together in some tidal pool. I cannot imagine a cell wall with no nucleic code sequence inside the cell, else why did the cell form? And I find it tough to image a nucleic code sequence floating around with no cellular structure around.
But it is theorized RNA may have landed here on a chunk of comet, based on finding ancient RNA code on chunk of space rock that landed here.

 

[bobsmith1492]

God

 

[wirm]

I think some random amino acids would have linked together to form protein strands (probably useless, flaccid ones) before forming something as advanced as DNA.

 

[venkman]

A DNA strand and a protein molecule are lying in bed. The DNA is smoking a cigarette with a satisfied smile on its face and the protein is frowning and looking a bit pissed off. The protein mutters, to no-one in particular, "Well, I guess we answered THAT question!"

 

[TridenT]

Originally posted by: bobsmith1492
God

lol

 

[destrekor]

Originally posted by: BurnItDwn
I'm no biology expert, but I think the most popular theory is that DNA came before protein.
Essentially, DNA may have evolved from something simpler, such as possibly RNA.

well DNA likely formed after protein, probably from radiation bombarding RNA found within protein-based structures. But the genetic sequence in some form is likely the first biological molecule structure.

 

[destrekor]

Originally posted by: venkman
A DNA strand and a protein molecule are lying in bed. The DNA is smoking a cigarette with a satisfied smile on its face and the protein is frowning and looking a bit pissed off. The protein mutters, to no-one in particular, "Well, I guess we answered THAT question!"

oh.
ahem, well...
:laugh:

 

[oiprocs]

Darwin.

 

[oiprocs]

Originally posted by: BurnItDwn
I'm no biology expert, but I think the most popular theory is that DNA came before protein.
Essentially, DNA may have evolved from something simpler, such as possibly RNA.

Popular theories are generally the least valid.

 

[Gibsons]

Protein, but probably in RNA-peptide form.

 

[rudeguy]

I'm still not clear on this...but I guess venkman won the thread

 

[dbk]

protein

 

[Barfo]

chicken

 

[Anubis]

cheeseburgers

 

[fulltilt39]

Originally posted by: venkman
A DNA strand and a protein molecule are lying in bed. The DNA is smoking a cigarette with a satisfied smile on its face and the protein is frowning and looking a bit pissed off. The protein mutters, to no-one in particular, "Well, I guess we answered THAT question!"

:laugh:

 

[Ruptga]

Originally posted by: destrekor
Likely protein.
But RNA or a precursor to RNA was likely the first biochemistry molecule chain.
But in all likely hood, the first ones likely both formed separately and merged together in some tidal pool. I cannot imagine a cell wall with no nucleic code sequence inside the cell, else why did the cell form? And I find it tough to image a nucleic code sequence floating around with no cellular structure around.
But it is theorized RNA may have landed here on a chunk of comet, based on finding ancient RNA code on chunk of space rock that landed here.

That description sounds a lot like viruses. Granted they aren't really "alive," and there's more to them than that, the idea doesn't sound too crazy to me.

But in any case we'll probably never know.