How does the structure of DNA allow it to copy itself when making a new cell?

Answer 1

DNA replication or DNA synthesis, it is the process of copying a double-stranded DNA strand. Since DNA strands are antiparallel and complementary, each strand can serve as a template for the reproduction of the opposite strand. The template strand is preserved as a whole piece and the new strand is assembled from nucleotide triphosphates. This process is called semiconservative replication. Ideally, the two resulting strands are identical, although in reality there are always errors, though proofreading and error-checking mechanisms exist to ensure a very high level of fidelity.

In a cell, this step is obligatory prior to cell division. Prokaryotes persistently replicate their DNA and creating a whole, new chromosome is a limiting step in cell division. In eukaryotes, timings are highly regulated and this occurs during the S phase of the cell cycle, preceding mitosis or meiosis I.


If you were to decide to physically “snip” a eukaryotic cell into two halves, it is certain that all of the components you need to allow each half to live and survive would be present in each half – each new cell, EXCEPT for the genetic material, the DNA in the chromosomes. It is a virtual certainty that any attempt to simply physically partition a cell that way would fail to give each new cell the correct genetic complement. That is why a cell undergoes mitosis when it divides asexually, the process of mitosis is essential, it causes each new cell to have a complete set of all of the chromosomes needed to survive and reproduce.

Answer 2

2d regulation argument fails. The Earth isn't a closed equipment. As to the easy formation of DNA, 2 issues. First the early Earth had a lowering ecosystem. this suggests the formation of complicated molecules became energetically favourite. Secondly DNA became quite a lot absolutely not the first genetic cloth. RNA became till now it, and something else might want to o.k. have predated RNA. RNA has an extremely interesting property, it may catalyze reactions. there is quite no want for any proteins. you'll have an organism with in basic terms RNA, and this became in all likelihood what the first lifeform became. All you want for evolution to commence is a RNA molecule that would want to catalyze its own replication (this kind of molecule has been assembled in a lab). Edit: there is one, and easily one, organic closed equipment (you are able to make one artificially). the completed universe. The results of it really is that finally the universe will die of entropy. it really is named the nice and comfortable temperature lack of existence, even as all capacity decays to an unusable type. this received't take position for trillions of years.

Answer 3

there are some free dna parts in cell, they join to make the exact same dna

Answer 4

its a double helix. this basically means it has two strands, these pull apart and two NEW strands attach onto them. So the strand has become 2 new ones!

Answer 5

check out this link.... should answer it for you....

http://en.wikipedia.org/wiki/Dna_replication