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Sagot :
Deoxyribonucleic acid or DNA is a molecule shaped as a double propeller of that contains the instructions an organism needs to develop, live and reproduce. These instructions are found inside every cell, and are passed down from parents to their children
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).
The nucleotides are complementary, thus the nucleotide A is only going to link with the T one and the G with the C.
http://www.livescience.com/37247-dna.html
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).
The nucleotides are complementary, thus the nucleotide A is only going to link with the T one and the G with the C.
http://www.livescience.com/37247-dna.html
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