What is the function of a DNA?
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The primary function of DNA is for protein synthesis.  Within the DNA sequence are millions of templates for proteins.  A protein called RNA polymerase "reads" the DNA sequence and makes a strand of mRNA (Ribonucleic Acid).  This strand of mRNA, which is similar to a negative image of a photograph, gets transfered to the ribosomes surrounding the nucleus.  In the ribosomes, molecules of tRNA bond with the matching triplets of mRNA.  Each molecule of tRNA is bound to an amino acid.  As more and more molecules of tRNA bond to the mRNA, the amino acids in tow are bonded together in sequence.  Eventually, the result is a fully functional protein.
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gene is the DNA or RNA in animals cell
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DNA=Deoxy Ribon Nucleic Acid.\n\nits the material in a nuclei i n a nucleus, in acell that stores the cells information.\n\n~LG23~
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If you're talking about which species a strand of DNA is a part of, these are recognized by comparing to known types for degrees of similarity.  For instance, we recognize a bit of DNA as being dgog DNA if it bears resemblance to DNA we took from a dog.\n\nOther than that, each bit of DNA is iether coding or non-coding (mostly, it's non-coding--but don't let the term "junk DNA" fool you, because it's very important for structural reasons).  In the coding regions, every three neceotides forms a "codon," and every codon relates to a single amino acid in a peptide chain sequence.  These peptide chains form proteins, which are the builiding blocks for just about every function in the cell body.  Lipids, sugars, and catalytic RNAs do so functions, but other than that, virtually everything is done by proteins.  they cause motility in cells, control transport, sort things, build nucelic acids, lipids, and sugars, create energy from food, detect light and pressure and other stimuli, link cells together, send messages--pretty much everything.  We call DNA the blueprint of the organism because it is the blue print for the proteins which do most of the work in defining and controling the organism.
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mRNA:\n\nRNA that serves as a template for protein synthesis\n\nDNA:\n\nThe material inside the nucleus of cells that carries genetic information. The scientific name for DNA is deoxyribonucleic acid.
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DNA tells your cells what to do and how to do it. it is the reason I have blue eyes and brown hair. It's the reason I love chocolate and can't stand brussel sprouts. The chromosomes of DNA are, as said before, like blueprints. That is why DNA plays a major role in the human body.
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because,DNA is the genetic material of all living organism.it has been proved by hershey chase experiment and griffit experiment.central dogma of body goes with the replication of DNA followed by transcription.then goes for translation in order to produce proteins.even though the difference between DNA of one person to another person is less than 1%,it really makes sense in the way of making difference in humans in their behaviour, taste, character, appearance n many others. from that, it is and the only truely blue print for all life.\nDifferences:\nDNA - deoxyribo nucleic acid\nRNA - ribo nucleic acid\nthey are different in their nitrogenous bases,DNA has adenine,guanine,cytosine and thymine but RNA has all but uracil instead of thymine.\nbcoz,of this, they differ in their functions.\n\nsimilarities:\nstructurally both are simililar.\nboth are nucleic acids
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(Click to enlarge) \nDNA \ndouble-helix DNA model\nA. adenine\nT. thymine\nC. cytosine\nG. guanine\nD. deoxyribose\nP. phosphate\n(Academy Artworks) \nDNA (dē'ĕn-ā') \nn.\nA nucleic acid that carries the genetic information in the cell and is capable of self-replication and synthesis of RNA. DNA consists of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. The sequence of nucleotides determines individual hereditary characteristics.
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DNA is used to create many different kinds of protiens.  It is the template that your body uses to create them.
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In many cases the so-called 'junk' DNA carried by many organisms is probably similar to the old wives' tale that we only use 10% of our brains.\n\nIt looks like a lot of DNA goes unused in the day to day operations of the cell and in the process of gene transcription, but this probably means we just don't know yet what it does, and not that it isn't needed.\n\nEverytime medical science has said that some organ or other is vestigial and serves no purpose, we soon find out that it really does have a function.  Not always a major role, or a vital function, but some function.  Usually this occurs sometime after the doctors have spent decades performing needless operations removing tonsils or appendixes willy nilly.\n\nIt seems likely that someday we'll find that a lot of that DNA really does serve a purpose.  Perhaps it is only switched on in special circumstances, or maybe it's something like a glossary that reminds the cell how the stuff in the rest of the DNA is supposed to be spelled, so that random errors can be corrected (or added to).  \n\nMaybe it really is useless, ancient data.  The genetic equivalent of our high school yearbooks or the address book from twenty years ago that's still stuck in the back of one desk drawer.  \n\nPerhaps it's material that the cell isn't using right now, but would be really valuable if we did.  Maybe it's like that cardboard box that goes through six moves without being opened, and so we finally open it, and HEY, COOL!!! LEGO!!!!
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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.
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d(eoxyribo)n(ucleic) a(cid) \nDNA is a nucleic acid that carries the genetic info in the cell and is capable of self-replication and synthesis of RNA. DNA consists of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. The sequence of nucleotides determines individual hereditary characteristics. \n\nr(ibo)n(ucleic) a(cid) \nRNA is a  polymeric constituent of all living cells and many viruses, consisting of a long,single-stranded chain of alternating phosphate and ribose units with the bases adenine, guanine, cytosine, and uracil bonded to the ribose. The structure and base sequence of RNA determines protein synthesis and the transmission of genetic information.
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Hi. DNA is a very simple structure that has a very complicated role. Free radicals (oxygen ions, for instance) can damage the DNA in a cell. It would require removal of the cell's DNA to do what you propose. May be better to neutralize free radicals in the first place.
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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
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In cell biology, the nucleus (from Latin nucleus or nuculeus, kernel) is found in all eukaryotic cells and contains the nuclear genes which form most of the cell's genetic material. Nuclei have two primary functions: to control chemical reactions within the cytoplasm and to store information needed for cellular division.
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DNA is a double helix molecule.  The 2 strands are aniparellel (one runs 3' to 5' and the other 5' to 3').  The DNA says in the nucleus of the cell.  The way it replicates is that in uncoils itself and separated from the other strand.  Because of the 4 different nucleotides it is simple to replicate.  The nucleotides are shown as A,C,T, and G.  G goes with C, and T goes with A.  After the stands have separated the nucleotides that are floating about attach themselves to the proper match.  They attach themsleves using an enzyme called DNA polymerase. Now you have 2 complete DNA strands.
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Proteins' main fuctions are to serve as biological catalysts in living things. That means that they allow biological processes to occur faster and more efficeintly. Also proteins are used to regulate biological functions. They serve other functions also such as chemical messengers, building blocks, and transporters. Because DNA, the code of life, encode ultimately for proteins, the proteins are central to almost every biological process from respiration to reproduction. The easier question to ask is what proteins don't do.