Monday, August 20, 2012

DNA Replication


DNA Replication?

DNA can copy its self over and over again in order to keep creating for the organism it is working for. This action is called DNA replication and takes place in the cell nucleus. 

How does DNA replication work? The molecules of DNA are made up of two strands of DNA that are connected together by hydrogen bonds. Hydrogen bonds always form between pairs that complement each other such as adenine compliments thymine and cytosine always pairs with guanine. When a molecule of DNA is trying to split fee of each other, an enzyme, called DNA gyrases, relaxes the strands so that they can split into two separate strands. Then the nucleotides in the nucleus bond with the unpaired bases with the help of DNA polymerase to the split strands and form two new DNA molecules. Once the strands are paired you have two new sets of DNA. Because there is one strand for the original and one new strand the replication process is considered semi-conservative, where one half is conserved from the original pair.

Why are there so many things to do for DNA replication? There are many things that have to happen in order for DNA to be replicated. This is because it carries genetic information and codes for everything in order for the cells to do their jobs. If the code is not replicated correctly then the information passed can cause extreme harm to the cell and the organism to the point where they could both die. 


2 comments:

  1. you really need more detail for this kind of thing, this doesnt even explain okazaki fragments

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  2. prof premraj pushpakaran writes -- 2018 marks the 100th birth year of Arthur Kornberg!!!

    ReplyDelete