The of begining life on earth

. Did you know that ALL viruses are malignant? There is not one single virus ever found that actually helps anybody, they're all bad.[/QUOTE]



Yes , but Could we somehow equate Mitocondrium as a foreign body call hi virus if you would accept that premises , then that will be the only one :)
 
Also, a virus is on the very limit of life. It does not breathe, eat, shit or do anything associated with "normal life". There is some debate as to whether they are actually "alive" or not as they do not conform to our general understanding of life. They are more like genetically programmed micro-robots.
 
yaracuy said:
. Did you know that ALL viruses are malignant? There is not one single virus ever found that actually helps anybody, they're all bad.
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Yes , but Could we somehow equate Mitocondrium as a foreign body call hi virus if you would accept that premises , then that will be the only one :)[/QUOTE]

Mitochondrion appear to be a primative bacterial cell, not viral. We integrated theminto our cells a billion or so years ago as a kind of mutual benefit. Mitochondria convert ATP to ADP which is how animal cells derive power from glucose. It gives them a willing host, and thier DNA remains seperate from own to this day.
 
Well, we start with Ribose. That is the backbone of the molecule. Then add the bases, A, C, T and G. Then we have a molecule that can form a double helix, or can be transcribed using ribosomes via Trna. You'd be amazed just how stable DNA is..It can last intact for millions of years encased in fossilised wood resin (amber). It can be attacked though by ionising radiation, free radicals and viral infection. Many cancers are formed due to this. The cells' internal Kill-switch gets turned off and the cells subsequently become "immortal", not healthy.
 
ULTRA said:
Well, we start with Ribose. That is the backbone of the molecule. Then add the bases, A, C, T and G.



I agree DNA is a great molecule stable as a rock , wound around a Histone and probably covered with an other proteine .

Friend we need to make nucleic acids , so the DNA ca replicate it self , produce a whole junk pyle of proteines which some have to be converted into enzymes , and we will not think temporarily about eukaryote but about prokaryots

So help me with the small molecules :)
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my friend, what you are proposing to do is outside the capability of biological science at present, and would be incredibly expensive for very little return. That's why scientists just manipulate existing organisms. Nature is the best biochemist I know of..
 
I would like to hear dome input form people who talk about biogenesis

during early days in the earth formation.
I would like to hear from the proponent of the theory of the primordial soup synthesizing the early chemicals , it is good to know the early chemistry.
 
Kennyc said:
Yes very interesting, that possibly pushes origins back a bit. :)
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Yes it is great , now I would like know what molecules are in the process . If it is like chloroplast , well that already probable have some DNA or RNA, that already is fairly advanced I mean way beyond primordial soup. I assume in the beginning, there might be some amino acids CO2. NH3, H2O, CH4, CRHR+2, CRH2R, SH2, PO4, minerals and other small molecules , Now I would like to know how do you get from this molecules to make proteines nucleic acids riboles and other sugars. I excluded Oxygen because it is said in the beginning oxygen was in very low concentration.
So please don't be shay I am showing mi ignorance :eek:
 
Kennyc said:
Yes very interesting, that possibly pushes origins back a bit. :)
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Yes it is interesting to put life 3.7 bil. so what is left 800 millio to earth formation , Y wonder how much time it has taken to cool down . The article mentions Photosynthesis, the Anaerobic life could have started earlier, or could some one from an other solar system dropped life on this planet ?
In my view there are other option then primordial soup
 
Panspermia is a very interesting theory that thus adds time for life to form as life would have arrived on earth from space from day one. The evidence is limited though we do know that complex organic molecules can form on and come from space dust, asteroids and comets. But if life came from space where did it come from before that?

We know that forming complex organic molecules are is not hard, We learned from the Miller experiments all you need are the basics CO2, NH3, H2O and then high energy, be it lightning, UV or even cosmic rays in space. But to go from complex molecules to self-replicating system which can select specific base molecules, grow, mutate and evolve metabolic processes is still a mystery all we have are an assortment of theories with intriguing but limited evidence.
 
ElectricFetus said:
Panspermia is a very interesting theory that thus adds time for life to form as life would have arrived on earth from space from day one. The evidence is limited though we do know that complex organic molecules can form on and come from space dust, asteroids and comets. But if life came from space where did it come from before that?
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I often wonder that myself. I sometimes wonder if life came here during what is often called the "Great Bombardment", when we were bombarded with icy comets early in Earths' history. It is thought most of our water was aquired in this event, maybe some life arrived here in deep-freeze from elsewhere. This type of theory is quite tantalizing as to where this life might have originated.
 
ElectricFetus said:
Panspermia is a very interesting theory that thus adds time for life to form as life would have arrived on earth from space from day one. The evidence is limited though we do know that complex organic molecules can form on and come from space dust, asteroids and comets. But if life came from space where did it come from before that?

We know that forming complex organic molecules are is not hard, We learned from the Miller experiments all you need are the basics CO2, NH3, H2O and then high energy, be it lightning, UV or even cosmic rays in space.


I am not sure how realistic the experiment was done , if the project would be realistic in the last 50 years someone would continue, I read recently was going to analyze the samples again.:eek:
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ULTRA said:
I often wonder that myself. I sometimes wonder if life came here during what is often called the "Great Bombardment", when we were bombarded with icy comets early in Earths' history. It is thought most of our water was aquired in this event, maybe some life arrived here in deep-freeze from elsewhere. This type of theory is quite tantalizing as to where this life might have originated.
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Let me trow in some monkey wrench :eek: We assume ( some of us ) there is or there was not life on Mars.
What would happen if our rover or the analytical tools landed on Mars and by some reason the tools were only 99.999 % sterile and would have left our terrestrial life on Mars, then in a few milloion life would propagate .
What will we call the beginning of life on Mars? creation , continuation, environmental soup ?
 
Live bacteria were found on the lens of a camera that went to the moon and back, so the theory is at least workable. I guess we'll just have to wait until we find life in a comet or elsewhere to know for sure. I like the idea, but prefer to think life started here as the chemistry is already here.
 
The life came from mars theory could be proven by simply going to mars and finding life there, its quite probable some life has survived on mars to this day frozen in its ice or deep underground, if this life is chemically identical to earth life it would mean they have a common origin. It does not mean it came from mars though, it could have come from earth though its more likely it came from mars (mars having less gravity and being habitable earlier than earth), it could also have come from somewhere else in space.
 
What we need to look for on Mars is a bunch of bacteria called Extrempohiles. These little blighters can digest rock, survive -60 degrees or more, hibernate through endless drought and even survive radiation that would fry our brains. The trouble is, they tend to go a fair ways underground, so we need to get a drill up there if we want to find them. They just look like a stain in the ground - nothing special...Except they are quite special really. A comet or meteor strike could dislodge them and deliver them around the solar-system. Europa, a moon of saturn would be a likely candidate to harbour this kind of life. These bacteria are experts at survival. Who knows, meteor strikes on Earth could have already seeded other moons and planets billions of years ago.
 
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