How Did The DNA Originate?
471916
ask god...haha i dont think your going to get a very precise answer to that question...theres too many theories out there..its like asking what came first, the chicken or the egg
749741
Actually, there is a lot of evidence that mitochondria may have originated as independent microbes, which somehow became incorporated into animal cells.  Mitochondria contain their own DNA.  Some rare genetic disorders stem from problems within the mitochondrial DNA rather than the DNA in the cell nucleus.  Incidentally, all of your mitrochondrial DNA is inherited from your mother.
530502
Ok, your question is very interesting and i think many people are thinking that you are jocking or crazy. Ok I will explain you some points:\n\n1.Fracis Crick, co-descovered ot the DNA structure says" The ADN structure could not have evolutioned in the earth in only 300 million of years, is very structured and developed to have been evolutioned in the eart in so short time."\n\n2.Probably the most certain theory about the origin of the life and the species in the earth is the Creation theory. This theory dont have contradictions and is very complete and let us explain everything about the origin of the life in the earth.\n\n3.There are a lot of evidence that the brain from the monk until the brain of the sinhantropus neede 15 million of years, but the brain with the homo sapiens appeared only 1 million of years after. This so Big Jump is impossible and the expert are not agree about what happened.\n\n4. The conlcutio is: We are aliens, because our DNA and our life is not from here, a Super Natural being created us, and this Being is our God. Now from the scriptures we can find many references about this Super Natural Being in the Bible and to him we should to feel respect because he has been with us from the fundation of the world.\n\n5.For this reason I think we are aleins and many reincarnation theories think that we have been in other lives in other planes and here is only one more that the planets where we can learn. For example, The asteroid belt, is considered by some clandestinity groups like a planet that was destroyed between the war between two races that are living in this planet today and they are having the same problems like there. Hopefully the eart will not finish like Traya de Maldek.\n\n6.Many conspiration theories says that the earth have a alien reaces from Z-Reticuli, and they are sharing technology with the American Goverment and it´s probably is a fact, but may be are rummors, the time will show us the true.\n\n7.And Like a Christian I think our Lord Jesus Christ is the most super natural being, our Master and opur Love, our example to Live and may be we will understand everything anbout this world because may be, like a old friend said me one day "The true is a Mirror Broken in thousand Pieces"
39430
Some believe that before DNA and protein, life existed in the form of RNA, evidenced by catalytic RNA in existence today (forming part of the ribosome: a protein building cellular machine) \n\nLess philosophically, amino acids (of which there are 20 types) are put together in sequences predetermined by DNA sequences. These DNA sequences are transcribed (copied) into an intermediary molecule of RNA, which is "read" by the ribosome (which gathers the correct amino acids to build the protein)
62320
well, hope these help:\n\nhttp://www.bbc.co.uk/dna/h2g2/A388217\n\nhttp://www.chemistrysurvival.com/
806306
All living beings on Earth have DNA
1136356
Deoxyribonucleic acid (DNA) is a nucleic acid —usually in the form of a double helix— that contains the genetic instructions specifying the biological development of all cellular forms of life, and most viruses. DNA is a long polymer of nucleotides (a polynucleotide) and encodes the sequence of the amino acid residues in proteins using the genetic code, a triplet code of nucleotides.\nIn complex eukaryotic cells such as those from plants, animals, fungi and protists, most of the DNA is located in the cell nucleus. By contrast, in simpler cells called prokaryotes, including the eubacteria and archaea, DNA is not separated from the cytoplasm by a nuclear envelope. The cellular organelles known as chloroplasts and mitochondria also carry DNA.\nDNA is often referred to as the molecule of heredity as it is responsible for the genetic propagation of most inherited traits. In humans, these traits can range from hair colour to disease susceptibility. During cell division, DNA is replicated and can be transmitted to offspring during reproduction. Lineage studies can be done based on the facts that the mitochondrial DNA only comes from the mother, and the male Y chromosome only comes from the father.\nEvery person's DNA, their genome, is inherited from both parents. The mother's mitochondrial DNA together with twenty-three chromosomes from each parent combine to form the genome of a zygote, the fertilized egg. As a result, with certain exceptions such as red blood cells, most human cells contain 23 pairs of chromosomes, together with mitochondrial DNA inherited from the mother.\n\nMolecular structure:\nAlthough sometimes called "the molecule of heredity", DNA macromolecules as people typically think of them are not single molecules. Rather, they are pairs of molecules, which entwine like vines to form a double helix (see the illustration at the right).\nEach vine-like molecule is a strand of DNA: a chemically linked chain of nucleotides, each of which consists of a sugar (deoxyribose), a phosphate and one of five kinds of nucleobases ("bases"). Because DNA strands are composed of these nucleotide subunits, they are polymers.\nThe diversity of the bases means that there are five kinds of nucleotides, which are commonly referred to by the identity of their bases. These are adenine (A), thymine (T), uracil (U), cytosine (C), and guanine (G). U is rarely found in DNA except as a result of chemical degradation of C, but in some viruses, notably PBS1 phage DNA, U completely replaces the usual T in its DNA. Similarly, RNA usually contains U in place of T, but in certain RNAs such as transfer RNA, T is always found in some positions. Thus, the only true difference between DNA and RNA is the sugar, 2-deoxyribose in DNA and ribose in RNA.\nIn a DNA double helix, two polynucleotide strands can associate through the hydrophobic effect and pi stacking. Specificity of which strands stay associated is determined by complementary pairing. Each base forms hydrogen bonds readily to only one other, A to T forming two hydrogen bonds and C to G forming three hydrogen bonds. The GC content and length of each DNA molcule dictates the strength of the association; the more complementary bases exist, the stronger and longer-lasting the association characterised by the temperate required to break the hydrogen bonding, its Tm value.\nThe cell's machinery is capable of melting or disassociating a DNA double helix, and using each DNA strand as a template for synthesizing a new strand which is nearly identical to the previous strand. Errors that occur in the synthesis are known as mutations. The process known as PCR (polymerase chain reaction) mimics this process in vitro in a nonliving system.\nBecause pairing causes the nucleotide bases to face the helical axis, the sugar and phosphate groups of the nucleotides run along the outside; the two chains they form are sometimes called the "backbones" of the helix. In fact, it
287732
Yes, there are two types of DNA: 1) Nuclear DNA (found in the nucleus) and 2) Mitochondrial DNA (obviously, found in the mitochondria).  Nuclear DNA consists of 23 pairs of chromosomes - 23 from mom and 23 from dad.  Mitochondrial DNA is received from your mom (whether you are a boy or a girl!).  Mitochondrial DNA is circular (nuclear DNA is linear), like bacterial DNA, which is one reason why it is thought that mitochondria may have originally been derived from bacteria.\nThere are only 13 genes in Mitochondrial DNA.  Nuclear DNA contains a lot more genes, with the latest estimates at about 23,000.
542692
It has to come from our Creator.\nAll the sequences and genes and chromosones that make up our body can not be a random factor.  There has to be purpose in all this, to make such a wonderful structure as the human body and keep all the genetic codes in place.\n\nIf you want the "Big Bang" theory, I am not for it... Anything that comes out of an explosion is demolition and destruction.  \nReminds me of a tornado in a junkyard theory, it doesnt produce any new machines, rearange parts for something new, it just destroys, rends and tears apart things.  \n\nThe atomic bomb didnt "create" anything new. It destroyed.\n\nSo, I attribute the DNA and RNA sequence to our Creator.\n\nJust my humble opinion...\n\nJesse
435774
Well, if we're going by the Theory of Evolution, the egg.  As the chicken's ancestors were slowly evolving to the current form of chicken, the last one who's DNA was  99.9999999999999999999% similar to the modern chicken layed an egg which contained 100% chicken.  So, the egg came first.
518841
Well, there is genetic analysis, both of the cell DNA and of the mitochondrial DNA.  That's been pretty darn conclusive in favor of evolution.\n\n(But I don't know why I bother answering you; you clearly have your mind made up already and are not interested in inconvenient facts.)
977995
One word contradicts your "facts". \n\nPlasmids.\n\nPlasmids are non-chromosomal loops of DNA found in bacteria.  They often contain antibacterial resistance genes, or give the ability to use different sugars.  These plasmids are commonly shared by bacteria.  This is a gain of genetic information.\n\nNow, it is true that we only have 4 types of nucleotides in DNA, and they make about 20 amino acids.  This is conserved in all life forms. But from this, a countless number of proteins can be made, and have a nearly infinite number of effects.  Your suggesting could be likened to saying that we can never invent a new word, since we only have 26 letters.  \n\nPlease provide a source for your claims, perhaps then we can understand how you arrived at such a conclusion.
371166
Evolution doesn't happen, one species doesn't evolve into another species.\nIn Darwin's time, scientists thought cells were just blobs of protoplasm. Since that time the advance of science has uncovered ever more powerful evidence that what Christians believe is true on all levels, including the natural world. And that is becoming even clearer today as scientists learn more about what is inside the cell-and especially the structure of DNA.\n\nAccording to cell biologist Bruce Alberts, president of the National Academy of Sciences, "The entire cell can be viewed as a factory that contains an elaborate network of interlocking assembly lines, each of which is composed of a set of large protein machines."\n\nEven the simplest cells are bristling with high-tech machinery. On the outside, their surfaces are studded with sensors, gates, pumps and identification markers.\n\nInside, cells are jam-packed with power plants, automated workshops and recycling units. Miniature monorails whisk materials from one location to another. No such system could arise in a blind, step-by-step Darwinian process.\n\nThe most advanced, automated modern factory, with its computers and robots all coordinated on a precisely timed schedule, is less complex than the inner workings of a single cell.\n\n"A bacterium is far more complex than any inanimate system known to man. There is not a laboratory in the world which can compete with the biochemical activity of the smallest living organism. One cell is more complicated than the largest computer that man has ever made." - Sir James Gray, from Cambridge University\n\nDNA is like a language in the heart of the cell, a molecular message, a set of instructions telling the cell how to construct proteins-much like the software needed to run a computer. Moreover, the amount of information DNA includes is staggering: A single cell of the human body contains three or four times more information as all 30 volumes of the Encyclopedia Britannica. As a result, the question of the origin of life must now be redefined as the question of the origin of biological information. Can information arise by natural forces alone? Or does it require an intelligent agent?\n\nDNA is composed of ordinary chemicals (bases, sugars, phosphates that react according to ordinary laws. What makes DNA function as a message is not the chemicals themselves but rather their sequence, their pattern. The chemicals in DNA are grouped into molecules (called nucleotides) that act like letters in a message, and they must be in a particular order if the message is going to be intelligible. If the letters are scrambled, the result is nonsense. So the crucial question is whether the sequence of chemical "letters" arose by natural causes or whether it required an intelligent source. Is it the product of law or design?\n\nSince DNA contains information, the case can be stated even more strongly in terms of information theory, a field of research that investigates the ways information is transmitted. The naturalistic scientist has only two possible ways to explain the origin of life-either chance or natural law. But information theory provides a powerful tool for discounting both of these explanations. Both chance and law lead to structures with low information content, whereas DNA has a very high information content."\n\nThe sequence of basis in DNA can not be explained by natural law because there are no chemical laws that make any sequence more likely than another. At the same time these sequences are so complicated that they can not be explained by chance.\n\n"Based on probability factors any viable DNA strand having over 84 nucleotides cannot be the result of haphazard mutations. At that stage, the probabilities are 1 in 4.80 x 10. Such a number, if written out, would read: \n\n480,000,000,000,000,000,000, 000,000,000,000,000, 000,000,000,000,000. \n\n"Mathematicians agree that any requisite number
912164
I don't really back this alien idea as most of our genes and DNA matches up with other animals etc on the planet so is that to say that aliens created everything?\n\nIf you mean did aliens just create humans then how can we explain all these matches with the existing life on Earth?
627308
maybe the origin of species has something
569604
It's a process where DNA is moved and separated by electrical currents bands are formed on a gel called agarose.  It shows similarities and differences between relations and non relatives.  The gel created is unique to you and therefore is how DNA testing can tell if the DNA supplied came from a certain source
950574
It's a key element in evolution, and comes about through modifications of an organism's DNA via radiation, chemical poisoning, or simple mischance in cell replication.  The daugther organism can inherit the modified DNA, and it may - or may not - give some advantage toward survival and subsequent reproduction.