When DNA replicates, how does it always make an exact copy of itself?

Answer 1

this is because it uses one strand of the double-stranded DNA as a template in synthesizing a new strand. this is called a semi-conservative mode of replication

moreover, in DNA there is always a specific base pairing (adenine with thymine and guanine with cytosine). therefore, from a given template, you can always obtain the same pattern of bases (adenine, guanine, cytosine, or thymine) because of this specific complementary base-pairing

Answer 2

Because the DNA strain is seperated during the process. There are 4 different nucleotides in a strain (А, Т, G, C). During the process the DNA chain which is now in half will have one of those (ATGC). The things, called t-helpers I believe will match up the ATGC with its pair. A to T and G to C. Therefore it always replicates exactly the same as the original though there can be some genetic mutations. If only one part of a chain is off it won't pair up correctly and the whole chain will be wrong.

Answer 3

Dude - there is a guy who spent 30 years investigating this and just last week won the Nobel prize for figuring out how... and you want us to explain this to you in 2000 characters on a website what took people with PhDs several decades to figure out?

Answer 4

first the DNA double helix unzips. then RNA comes in and attaches itself in the complimentary order. then the RNA seperates from the 1/2 strand of DNA and amino acids compliment it in the same order as the DNA. pretty cool, HUH?

Answer 5

Many repair complexes, but it does not always copy true. You have heard of mutations?

Answer 6

because our body have certain pattern which avoid the mis match of coupling base during replication.

Answer 7

copy + paste
ctrl c + ctrl v

Answer 8

http://www.ncc.gmu.edu/dna/replicat.htm

this link has everything you need to know!!! Good Luck

Answer 9

dude u expect that from normal people?

google it :)