the structure of DNA and the components present in it
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DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C)
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DNA bases pair up with each other,A with T and C with G,to form units called base pair. Each base is also attached to a sugar molecule and a phosphate molecules. Together,a base,sugar and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.....
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