Friday, March 4, 2011

DNA

DNA or Deoxyribonucleic Acid is the Nucleic acid that contains the genetic material that makes us all who we are. The strands of DNA are in the shape of a double helix. The reason it's in the shape of the double helix, is because the outside strands of the DNA are polymers called nucleotides, with sugers and nitrogenous bases running perpendicular to them and connecting between them with hydrogen bonds in the middle. It is also these bonds that make DNA replication possible. DNA is found in the structures called chromosomes. It's in cells and whenever a cell reproduces, it splits the DNA down the bond in the middle so that both cells have DNA. Then the cells copy the rest of the DNA based off of what is left of the DNA, making a perfect copy of the strand of DNA that was there before. Both of the daughter cells then have the DNA. The phosphates that are in the middle are always paired up with certain other phosphates. They have an order, and aren't just randomly paired together. That process is known as DNA Replication.

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