importance of dna replication?
918895
If it didn't, you wouldn't exist.
791273
Definitely b...\nDuring Interphase, there are 3 subphases - G1, S, and G2.  G1 is for growth of the cell, S is for synthesis of an extra set of chromosomes (amount of DNA in cells), and G2 is for preparation for the rest of cell division.  After interphase is prophase (nuclear membrane dissolves and DNA bundles up), then metaphase (DNA lines up on the center of the cell), anaphase (DNA separates towards poles), and telophase (Cell divides into two cells).  I hope this helps!\n\nAnswer: b. between the G1 and G2 phases of the cell cycle
210214
The origin of DNA replication is characterised by A-T rich region. This is because only 2 hydrogen bond are form between this base pair, compare 3 hydrogen bond form between C-G base pair. This allows the enzyme to separate the 2 DNA strands as this A-T rich region is the weakest.
794759
dna polymerase: an enzyme that assists in DNA replication. Such enzymes catalyze the polymerization of deoxyribonucleotides alongside a DNA strand, which they "read" and use as a template. The newly-polymerized molecule is complementary to the template strand and identical to the template's partner strand.\n\nrna  polymerase: an enzyme responsible for making RNA from a DNA or RNA template. RNAP accomplishes this task by constructing RNA chains through a process termed transcription. In scientific terms, RNAP is a nucleotidyl transferase that polymerizes ribonucleotides at the 3' end of an RNA transcript. RNA polymerase enzymes are essential and are found in all organisms, cells, and many viruses.
249178
Are you asking about DNA causing itself to be assembled?
154157
DNA replicates for cell division.  The new cell gets the same DNA as the parent cell.  DNA replicates during mitosis.  DNA also replicates into RNA.  This is done inside the nucleus.  RNA is the exact opposite copy of DNA.  RNA aids in the synthesis of proteins.  The RNA goes to the ribosomes and synthesizes proteins.
31792
DNA stands for DEOXYRIBONUCLEIC ACID.\nITs one of the type of Nucelic acid.In order to understand the role of DNA its important to understand the structure of DNA in a cell.In prokaryotes-DNA IS NOT ENCLOSED IN A NUCLEUS.Whereas in Eukaryotes-DNA is enclosed in a nucleus.\nSince you want to understand the structure of DNA.\nlets look at its components first\nmonomer of DNA IS NUCLEOTIDE\neach nucleotide is made up of Deoxyribose sugar,Phosphate group and any of the 4 nitrogenous base I.E. ADENINE(A)\nGuanine(G),Thymine(T) and Cytosine(C).Base pairings A-T AND G-C ALWAYS.\nPrimary structure of DNA IS  like a ladder structure and then it forms the DOUBLE HELIX STRUCTURE AND THEN IT GOES TO super coil stage known as Tertiary structure and last is Quartenary structure or chromosome stage, you don't always see DNA in its quartenary stage only when its undegoing cell division otherwise mostly you will see DNA in a supercoil state i.E. Tertiary stage.
765899
OF COURSE!!!! This is the whole idea of mitosis, my dear!\nAt least in healthy non-cancerous cells.\nEukaryotic cells need to undergo replication of DNA (during the S-phase of the cell cycle) prior to divide into 2 IDENTICAL daughter cells, with identical set of chromosomes containing one copy of each sister chromatide. Mitotic defects are due to problems with the mitotic spindle and generally lead to aneuploidy and to mitotic catastrophe (or cell death). A mechanism of control of this process is called mitotic spindle checkpoint and ensures that the protein complex that keeps the sister chromatides together is only degraded when all the chromosomes are correctly aligned and their kinetochores are attached to the spindle pole bodies. Proteins involved in the regulation of the mitotic spindle checkpoints include kinases, such as BubR1 and AuroraB, proteases, such as separase and the APC complex, and ATPases (clamp loaders) which "load" the complexes onto the DNA.\nOf course, if the cells undergo mutations during DNA replication, the two daughter cells may not be identical, but these are rare events.
677533
That's like asking "WHY does the sun shine?" or "WHY does the heart pump blood?"  (Really.  Think about it.  Can you answer those questions?  If so, then please add this to your question so we can understand what you mean by WHY.)\n\nScience can't offer an answer to this kind of WHY question.  We can understand the mechanisms involved (the sun shines because of nuclear fission ... what you're calling the HOW) or give an answer in terms of higher-level function (the heart pumps blood to keep the organism alive).  But we can't ask the sun or a heart WHY it does what it does.  Similarly we can explain the process of replication, and the function it serves to reproduction, but beyond that, science can't ask a DNA molecule WHY it does what it does.
846654
Some DNA viruses already have the ability to insert their-own DNA into the DNA of the cell infected and use the cells "machinery" to multiply. By inserting into the DNA of the virus a "patch" (a DNA segment coding for the missing protein that caused the original disease) can be also inserted. It is hoped that enough of the infected cells can utilize this "patch" to correct the absence of the protein, tissue and organ-wide..
935480
I don't know of any scientist who proposes that order.  You can't have cells, or metabolism, without replication (a cell that eats but doesn't replicate ... well ... isn't much of an ancestor).\n\nReplication is absolutely the first requirement.  Then replication with heredity (RNA, then DNA).  That is an absolute prerequisite for natural selection, which can do the rest.\n\nHowever, it is somewhat of a mistake to say that these things happened in a specific *order* 1, 2, 3.  \n\nFor example, proteins are good catalysts but terrible replicators.  And DNA is a phenomenal replicator (low error rate), but a terrible catalyst.  RNA is pretty good at both.  So the very earliest life forms were probably short strands of RNA that both replicated and catalysed (the beginnings of metabolism).  By the time full-scale replication with RNA or DNA was getting started, so was the synthesis and breakdown of proteins (metabolism) and this probably occurred in something resembling lipid droplets in water, the beginnings of cellular life.\n\nIn other words ... like almost everything else in life, these three things probably evolved *together*.
1108483
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 many 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. DNA is thought to date back to between approximately 3.5 to 4.6 billion years ago [1].\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 color 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.
608688
I think you need to be a little more specific.\n\nIncidently we have found many things that may be just as important as what genes you have in terms of what makes organisms similar.\n\nFor instance they have found that there can be variation in the number of gene copies you get (this even varies person to person). \n\nThere are various non-coding regions in DNA that may have functions we don't know about. For instance we know some of them are involved with turning genes on and off.\n\nProteins, the products of genes, are often altered after they have been made.\n\nRNA (chemically related to DNA) may have other functions we are currently unware of. The have found RNA that has been linked to turning genes on and off.\n\nRNA is the messangaer molecule that tells the protein making machinary (ribosomes) how to make a protein. Some RNA has been found that DOESN'T do this. They have found RNA in trees that is used to fight off viruses by binding to foreign virus DNA (this may happen in animals too). \n\nWe are learning lot of new things about RNA and post-translational (changes after proteins are first made) changes.\n\nSo don't judge similarity purely on DNA similarity because similarity is based on similarity genes rather than non-coding regions and the other things I talked about.
68378
I think what you're looking for has to do with replication. Every time the cell goes through mitosis to divide, it has to make an exact copy of all the DNA in the cell, so that there are two complete copies, one for each daughter cell. The process of replication and division is the cell cycle.\n\nIn replication, a complex of enzymes copies the DNA by unzipping the double helix to expose the single strands. Someone else mentioned A-T C-G bair pairing and that is correct. The four subunits in DNA are the bases, and they are abbreviated A,T,C and G. Just by the shape of the molecules, A will connect with T and C with G pretty much always (though there are exceptions that are beyond the scope of a general explanation). \n\nSo in replication, enzymes pull the two strands of the double helix apart in short regions, pulling apart the A-T C-G bair pairing. It is energetically unfavorable to have a single strand of DNA exposed and not base paired. Free nucleotides in the cell will come in and form hydrogen bonds with the exposed template strand (it will happen on both strands), and then enzymes will connect the newly deposited bases with phosphodiester linkages to form a new DNA molecule. This forms a new strand of what is called duplex DNA, meaning it is a new double helix. The complementarity of the base pairs drives replication to produce an exact copy of each part of the genetic code. The error rate is very low, but errors can and do occur, and there is proofreading machinery to check for mistakes and excise and replace incorrect base pairs.\n\nPictures are helpful...in the second link, scroll down to see the replication bubble. A replication fork and a replication bubble are essentially the same thing...it's the site where the double helix is open and replication is occurring.
1032144
RNA, most assuredly.\n\nDNA is a great replicator, but a lousy enzyme.\n\nProteins make great enzymes, but lousy replicators.\n\nRNA makes a pretty good replicator, and a pretty good enzyme, so is a much better candidate than DNA for an early replicator that becomes its own catalyst.  However, RNA replication is far more error-prone than DNA, so it is not sufficient for coding for complex organisms.\n\nSo what we have now is DNA which is stable (error-correcting) enough to support *huge* DNA molecules that store information for tens of thousands of genes through an indefinite number of generations ... but RNA is used as an intermediary carrier of information during protein synthesis.
295057
Everything DNA polymerase needs to replicate DNA is found in the nucleus. Thats all the various factors required by DNA pol to bind, the various enzymes like helicase that sort out the DNA so it can be copied, the primase to lay down the primer region and the nucleotides required for the new strands
493756
A virus needs a cell to replicate itself. You see viruses have absolutely no ability to reproduce on there own. They basically "hijack" a cell and then the cell makes a copy of the virus.