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DNA Strucutre
DNA is made of a double strand helix. It has a sugar phosphate backbone that has antiparallel strands. Pairs of nitrogen bases hold together the two strands bonded by hydrogen bonds. These bonds are: adenine, thymine, guanine and cytosine. They all have to pair correctly with their corresponding base. Adenine pairs with thymine and guanine pairs with cytosine. This structure of the DNA strand is a “template” when making new DNA strands. Because of this, DNA is able to make exact copies of genes used for inheritance. This makes two identical copies of the original DNA strands, these two strands eventually get distributed to the two daughter cells. Information from: Campbell, Neil A., and Jane B. Reece. Biology. New York: Custom Publishing, 2008. Print.