Why is DNA necessary?
454638
Weird question.\nDNA is what's life made of, It is a chemichal compound (nuclic acid) in the form of a double helix which has the unique ability of dividing  where each devided branch can form a new mollecule. It is the first living chemichal out of which all life evolved. It is composed of 4 groups of amino acids Citozin-Guanin-Thiamin-Adenin(spelling?)\nin short, it is the building blocks of life, DNA and RNA (Deoxy ribonuclic acid and ribonuclic acid) are the building blocks of life. Understanding their role is the key to understand heriditary, genetics and evolution.
1060960
DNA (Distributed interNet Architecture) is an abstract methodology. It is a way of designing applications with growth, deployment, and load taken as major considerations.DNA is just a way to think about writing applications.DNA is more than just an abstract pattern. It is also a very tangible set of technologies. Specifically it is a set of (traditionally) Microsoft technologies that together help developers implement the DNA architecture within their applications.
892517
RNA is significantly less stable than DNA.  Both in terms of overall structural integrity, and its succeptability to mutation.\n\nThere is a rather large gain of fitness by having DNA storage of information instead of RNA.  After a few billion years that's why we are where we are.\n\nA few things (RNA viruses) continue to utilize RNA as their genetic material, but their success is due to the very lack of stability that makes an RNA-based genetic system a bad idea for "living" organisms.
737692
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the biological development of a cellular form of life or a virus. All known cellular life and some viruses have DNAs. DNA is a long polymer of nucleotides (a polynucleotide) that encodes the sequence of amino acid residues in proteins, using the genetic code.\nDNA is responsible for the genetic propagation of most inherited traits. In humans, these traits range from hair color to disease susceptibility. The genetic information encoded by an organism's DNA is called its genome. During cell division, DNA is replicated, and during reproduction is transmitted to offspring.\n\nIn eukaryotic cells, such as those of plants, animals, fungi and protists, most of the DNA is located in the cell nucleus, and each DNA molecule is usually packed into a chromosome that are passed to daughter cells during cell division. By contrast, in simpler cells called prokaryotes, including the eubacteria and archaea, DNA is found directly in the cytoplasm (not separated by a nuclear envelope) and is circular. The cellular organelles known as chloroplasts and mitochondria also carry DNA. DNA is thought to have originated approximately 3.5 to 4.6 billion years ago.[1]\n\nIn humans, the mother's mitochondrial DNA together with 23 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. Lineage studies can be done because mitochondrial DNA only comes from the mother, and the Y chromosome only comes from the father
734251
dna is a chemical code inside every living cell that determines how the cell functions.
115635
DNA contains a complete blueprint for the body, not only for growth but also repair.  Although each cell contains a complete copy of the original DNA, the particular cell is differentiated from the original DNA containing cells at conception and can only make cells of a particular type (blood, skin, bones, brain, etc.).  During growth, cells divide because the blueprint has not been completed.  Much later little growth is required except perhaps hair, skin and gut lining, etc. and DNA splits and reproduces to make repairs (to patch wounds, etc.) to restore the blueprint construction to normal best it can.  Differentiation may occur because particular cells are influenced by surrounding cells.  Therefore a new toe never grows within a damaged eye.
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I'm almost 100% sure that the answer is "It ensures that the DNA will be replicated for new cells"\n\nWhat the question is talking about is the way in which the bases pair together.  I'm sure you've been taught that the bases pair as follows:  A-T and C-G.  When DNA is replicated, it is "unzipped" leaving two strands of DNA that each have bases that aren't paired.  In order to make 2 new complete strands, the correct bases must be added to each of these half-complete strands.  This is where the question comes into play.  If the bases could pair in any way possible the new strands would not be identical to the original.  This is why it is critical that A only pairs with T and C only pairs with G.\n\nI hope this helps.  Questions like this really test your knowledge of the material.  It is one thing to know A-T and C-G.  It is another to know why these combinations are critical in the process of replicating DNA.
1025938
DNA (Deoxyribonucleic acid)\n\nUsually in the form of a double helix, [it] contains the genetic instructions specifying the biological development of all cellular forms of life, and many viruses. -Wikipedia
842928
base on theory, yes. but practicaly, the problem is the sample of DNA, there is complete DNA code or not.
299525
DNA viruses often require the host cells' machinery in order to replicate their genomes.  Most cells in your body have stopped dividing and no longer make the proteins required to replicate DNA.  Therefore, the viruses have evolved mechanisms to reactivate the genes encoding for these proteins.  Unfortunately, this can also lead to reactivation of DNA replication of the host cell, uncontrolled cell division, and ultimately cancer.  RNA viruses, on the other hand, need to make their own proteins to replicate their genomes since the host cells often do not possess the machinery to replicate RNA.  Therefore, RNA viruses do not need to activate pathways in the host cell that may cause cancer.
1186162
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.\n\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.\n\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.\n\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\nThe discovery that DNA was the carrier of genetic information was a process that required many earlier discoveries. The existence of DNA was discovered in the mid 19th century. However, it was only in the early 20th century that researchers began suggesting that it might store genetic information. This gained almost universal acceptance after the structure of DNA was elucidated by James D. Watson and Francis Crick in their 1953 Nature publication. Watson and Crick proposed the central dogma of molecular biology in 1957, describing the process whereby proteins are produced from nucleic DNA. In 1962 Watson, Crick, and Maurice Wilkins jointly received the Nobel Prize for their determination of the structure of DNA.
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Simply DNA is an organic computer program which contains all of the information to grow an organic creature, such as mice, worms and humans.\n\nDNA is all but as individual as you are, so DNA can be used by forensic scientists to narrow down the search for the perp in a murder enquiry.\n\nDNA (if read) can provide much information:\n\napproximate height, hair colour, ethnicity, eye colour, approximate age, etc...
773389
RNA starts at promoter\n\nDNA needs primer to start
325792
of coarse. DNA is found in every cell. not just semen.
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The primary function of DNA in most organisms is protein synthesis. DNA holds the "blueprint" for every protein necessary to sustain life. \n\nThe combination of a certain gene's base pairs is transcribed into messenger RNA (or mRNA). That mRNA is then carried to the ribosome where, with the help of transfer RNA (or tRNA) amino acids are assembled in a particular order to form proteins. And proteins are essential in just about every step of the life functions of an organism. \n\nIt's these proteins that make your eyes blue, your hair brown or give you no hair at all. In fact, all genetic traits are expressed through proteins created using the DNA blueprint. People look different and have different characteristics due to variances in the types of proteins and combinations their genes code for.
909881
Though you will ignore the answer, I'll try anyway.  \n\nYour question, with explanation was a classic straw man, so I'll answer your question.\n\nI do not support ID as per se, but, all they are saying is the following:\n\nStep 1:  dna exists.\nStep 2:  later, new dna exists which could not have been eluciadated from existing dna, because there is unquestionably new and unique information in this new dna, which did not exist before.\nStep 3:  how did it happen?  \nStep 4:  it either happened by some still unknown natural or biological mechanism, or it was caused, created.\nStep 5: the natural or biological mechanism seems unlikely as the cause for strictly reasonable and logical reasons.  However, if it could be discovered, it would be one of the most important discoveries ever, and would be communicated as such.  This is still one of the mysteries in biology.  \nStep 6:  new information is not created by natural and random processes.  This just does not occur in nature.  Based on experience and logic.  \nStep 7:  based on the above, it seems that design is involved.\n\nThis is not hard logic.  The point is that you have closed your mind to the issues the ID people are trying to consider, and ID people are fully engaged in science.  What happens if you are wrong?\n\nBasically, ID does not say design is perfect, however, it could very well be optimal, and that takes intelligence, and then it is not a flaw.  ID people have answered your question many times.  Many you need to do some reading.  I cannot say the retina is shoddely wired.  Your remark was a rhetorical and opinionated remark.\n\nNot trying to give you a hard time.  Just the facts.\n\nEdit:  Anything that is proven by science, I agree with.  Duplication is well known.  I hope I was clear.  The issue is:  Here is dna without a certain new function, like a lung, or kidney, or brain, or eye, or skin, of bone, or hair, of tear duct, or immune response, etc.  Later, a 100 lines, or millions of lines of new dna exist with this code.  Duplication is not the mechanism, for the function did not exist, and requires some pretty profound new engineering to create.  The unanswered question is:  how did it happen?  Randomness cannot be part of the solution, since the improbabilities are far too great.  \n\nCan this question be answered, or is it still open?  The answer I usually get is, well just because we do not know, does not mean we should accept the possibility of a creator.  I say, you should consider both, until we have an answer.  You may lean one way or the other, but both are still possibilities.  \n\nThe most knowledgeable scientists agree for example, in cosmology, the closer we get to the beginning of the universe, the more the questions become philosophical and theological.  You are discounting a vital side of the story.
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The function of DNA is to code for proteins, and as a store of information that can be easily and meticulously reproduced.\n\nDNA is found in the nucleus in eukaryotic cells, and in plasmids/free in the cytoplasm in prokaryotes.\n\nDNA has 4 nitrogen bases: adenine, guanine, cytosine and thymine\n\nthey bond through hydrogen bonds