what is DNA stay for?
91264
deoxyribonucleic acid-but you dont really need to know that
322269
Ethanol relaxes the DNA, making it leave its partner, much like the effect it has on humans...\n\nJust kidding
1127492
These types of DNA are used to create a much more accurate diagnosis of DNA samples lef tfrom teh crime\n\nemail me a kkstrong0@yahoo.com if you have further questions and ill try to tell you what i know
125186
(I just did this today in lab with bacteria instead of onions!) Other liquids can do many things to DNA, but water binds to the DNA and "elutes" it, the DNA will stay with the water. (look up "elute")
856318
The function of DNA is to allow an organism or cell to synthesize proteins and to pass that cell's/organism's characteristic to future generations of both cells (mitosis) and offspring (meiosis) \n\nIn protein synthesis, the vast DNA base pair sequence contains the blueprints for every protein produced by the body.  Through transcription of certain genes by RNA polymerase a strand of mRNA is produced.  This mRNA then exits the nucleus and enters the ribosome.  There, with the help of tRNA, the ribosome "reads" the mRNA and constructs a chain of amino acids until a complete protein is produced.  \n\nIn order to make sure future cells have the exact genetic makeup of parent cells, DNA Polymerase unzips the double helix and makes an identical copy of the entire DNA sequence.  During mitosis, these identical chromatids separate, and the cell divides into two daughter cells with identical DNA.
867996
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.
945737
The DNA has to be wrapped up very tightly to fit all of it into the nucleus.  This is a complex process involving chromatin (DNA and associated proteins).  For example, histones are groups of protein molecules that the DNA strand wraps around to help compact its shape.  For a gene to be expressed (transcribed) a section of the the DNA has to become 'unwrapped' and 'exposed' to the transcription machinery.  Methylation and Acetylation of histones play significant roles in this process.\n\nAny good, recent, biochemistry textbook will explain these issues.  If you go to pubmed, they have an online book section.  Click on any of the biochemistry books and enter into the search field "DNA, chromatin", or "DNA, histones", or "gene expression, chromatin" and you will find lots of info. and probably pictures too.\n\nBest wishes and good luck.
14935
its DNA it is a part of a gene which is a thing wich codes for something. it is a double stranded structure. its also called a polynucleotide.
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ofcourse, using any other Body cell. every cell has DNA
76274
To carry DNA, to host the machinery of protein production, to serve as a host to metabolic actility, and to keep things separated that need to be kept separate.
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This is mostly true, but try it without RNAse, the yield is not that different.  It's for degrading residual RNAse I guess.  I think without RNAse the RNA and DNA bind together (not directly, but through huge protein/nucleic acid complexes), so the RNAse helps break this complex and release DNA.  Hope this makes sense.  It depends on the prufication procedure too, some just purify nucleic acid and rely on RNAse to get rid of RNA.  Some are specific for DNA. (ie qiagen).
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DNA testing is like any other science, It can be used for good or evil. The average person cannot alter their DNA. But someone in a lab could "arrange" for the DNA that they are looking for to appear as a positive(or negative). Until the day when we live in a corruption free society all evil things are possible.
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DNA is an abbreviation for Deoxyribonucleic Acid. \n A piece of a chromosome that dictates a particular trait is called a gene. \n Each DNA strand is 10 atoms wide. \n The DNA stands in your body stretched out would be about 500 million miles long. \n There are so many millions of base pairs in each person's DNA that every person has a different sequence
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DNA fingerprinting is a way to identify individuals DNA.  It is what forensic scientists use to figure out whose DNA is found at a crime scene or whatever.  Each person has their own unique "fingerprint" except maybe in the case of identical twins.\n\nDNA or "DNASE" footprinting is different.  It is a technique used by researchers to see where a protein binds a piece of DNA.  The DNA with the protein attatched is isolated, and digested with varying amounts of DNASE (an enzyme that cuts DNA).  You then run the DNA out on a gel and find where the DNASE was not able to cut.  Wherever it was not able to cut is where the protein was bound and on a gel it resembles a "footprint"
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anthotcool's answer is ... ummmm... yea-no. i'll just ramble till i reach a conclusion. \n\nlike anthotcool said, food is broken down to amino acids. In order for those amino acids to integrate into your dna, they'll have to be broken down even further and reformed into nucleotides. from there, those nucleotides can be used in replication and repair. If u track these inserted bases, some might be used to form genes, others not.\n\nI say the answer's no. unless the regulation system for both the nucleotide formation and dna integration are out of whack, there will be no change to your genes.\n\ntechnically, if a base pair or sequence derived from food stuffs happens to randomly mutate (which happens) in a coding region, then ya. whtvr. but that'd really push it.\n\nEating a radioactive apple however...\n\nit'd also work if the amino acids were used in making faulty proteins such as enzymes or transcription factors. it's still a stretch because of regulation... i just wanted to cover the bases.
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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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They get DNA from nucleated cells like white blood cells (in blood and saliva) and epithelial cells (in saliva). They lyze the cells to free the DNA, centrifuge and take the fraction with the DNA, treat and amplify or multiply the DNA fragments, put markers or specific labels, determine the presence and amount of this marked or labeled fragments, and compare the distribution with known samples or DNA database. DNA results are usually one page long.