if dna transfers onto a object or person how long can it stay there??e.g by touch or wind?
541814
DNA is a molecule, not a living object. It can stay there as long as it is not disturbed and swept away.
768036
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.
417609
Generally the idea is that the DNA does not necessarily have to be introduced into every cell of the human body to cure a disease because not every cell in the body may be affected by the disease. \n\nCurrently the main idea is using viruses which are made harmless to humans. Viruses can insert DNA into their host. They can infect either only a certain cell type or a wide variety. \n\nRead up more detail about viruses used and non-viral options using the link provided or do further research using a search engine. \n\nIf it is a genetically inheritable disease I assume that the best option is if there is a very high risk for the children to have a genetic disease they would try to manipulate the DNA in a fertilized egg, so probably techniques from in-vitro fertilization would be used. Don't know if that works yet, but I am sure there is a website out there which explains that.
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
783548
The short answer is no.\n\nThe long answer is no, never, not ever, no how, no way, don't even think about it, impossible, etc... :)\n\nDNA is the instruction manual for every living multicellular organism and is contained in every nucleus of every cell in the body.  It is physically impossible to extract DNA from an organism without killing it, liquifying it, and separating the nucleic acids from all the other proteins.  Not something anyone would volunteer for, I would imagine.  Then you would have to figure out how to insert this into trillions upon trillions of cells before the receiving body dies due to lack of protein production.\n\nAlso, even if somehow you were able to extract DNA from every cell and replace it with some other DNA, you would end up destroying the organism anyway.   Changing the DNA is like using a cake recipe to build a car engine.  You would only end up with a mess under the hood.  \n\nEven if you replaced the DNA with another human being's DNA, there would be such severe rejection because of the production of non-self proteins and HLA mismatches that the body would almost immediately cease to function.  It is difficult enough to transplant a heart without causing rejection by the host body because of specific proteins found in the donor organ.  Imagine what would happen if every cell was doing the same thing... think of that senator character from the first X-men movie.
967036
You need to define "viable and non-viable" cells....if DNA is still present for reconstruction of crime or accident...then the cells are viable.\n\nIf you are wanting to grow cells in a medium..then if the cell walls are intact and no damage to the cell structure has occurred...then the cell will be viable...\n\nmaybe this will help\n\n\nGood luck
1033247
Here's a great animation that helps explain it:  http://www.johnkyrk.com/DNAreplication.html
202746
Checkout what is being done with nanotechnology and building structures, Complex structures!, with dna strands!\n\nhttp://www.nature.com/nature/links/040212/040212-1.html\n\nIf it CAN and it can be measured imagine what can be done!\nalmost scary!
751115
dna of any person is as unique as the stripes on tiger skin.....so theres no ques to get confused.....and dna is present in the neucleus of cell of a person and the thing is that the nucleus is absent in blood cell so there s no fear of anykind that dna will change or sumthing else .....clear that theres no nucleus in blood cell n dna is present in nucleus only
372921
http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Lectures/DNA/dna.htm
268018
Inside of each cell of the human body is a nucleus.  Inside of it are genes and chromosomes.  Inside of those are complex strands of proteins and amino acids that together are calle deoxyribonucleic acid or DNA.  This DNA contains the "blueprint" for an entire human being.  When two people mate, their DNA gets combined to form a new human, unique but having many characteristics shared by the parents' DNA.  Have you ever heard the term "genetic lottery"?  This is because each time the DNA from two humans is combined to make a third new human, the combination of DNA is to an extent random.  Only to an extent.  I inherited my mother's bad vision and my father's bad teeth.  I inherited my father's nose.  But I am taller than either of my parents.  My hair is a completely different color than either of theirs.  Sometimes DNA, genes, and chromosomes are imperfectly formed.  Each gene controls certain characteristics about a human being.  Completely normal parents can wind up having a baby with Downs' Syndrome (Mongolism, a type of mental and physical retardation).  Completely normal parents can wind up having a dwarf baby.  But other problems are passed down directly from one generation to the next.  Hemophilia is one example, the people whose blood won't clot.  They can bleed to death from a cut.  If they fall they can bleed internally until they die.  Hemophilia is passed down from one generations to the next in the female line.  Queen Victoria, who was related to most of the people of the royal and imperial houses of pre-World War One Europe, was a carrier of the genetic defect of hemophilia.  The women who carry this are usually immune to it.  It is the boys they give birth to that can suffer and die from uninterrupted bleeding due to this genetic defect.  How to prevent one's son from being hemophiliac if one is a female carrier?  Adopt.
737412
Normal red blood cells have a life of about 120 days, and do not have a nucleus, so DNA is extremely minimal. White blood cells, which do have a nucleus, last about 10 days. Transfused blood has had most of the white cells taken out, and does not last as long as your own blood when transfused. So the amount of time it would take for the donor DNA to be cleared from the body would be days, not years. I believe that a swab from the inside of the mouth would circumvent any problems involving blood transfusion and DNA, anyway.
625092
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.
1126179
It can only be transferred by bodily fluids. Even  if the person had an open cut on the had, the HIV can only live outside the body for a few seconds. your pretty safe.
966683
Note the answers on 2, 3, 5 and 7 ... that's where we all differ.\n\n1) organic compounds\n2) oxygen or respiration (the question is not clear)\n3) molecular basis for genetics (not chromosomes ... some DNA is outside the chromosomes ... and there's no RNA in chromosomes)\n4) condensation\n5) lobster (ask anyone from Maine)\n6) freezing or solidification\n7) weight (not mass ... mass is the amount of gravity exerted *by* the object, not acting *on* it.  I.e. mass is independent of the gravity acting on it ... since the more gravity experienced, the more it weighs, weight is more correct). \n8) boiling or vaporization (or if you're in England, vapourisation)
381262
a virus can be transferable to another person. Usually by direct contact kissing etc.. Other forms of transmission are coughing or transference by touching an object and then another person or persons do the same. depends on the virus and the object touched.
247302
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