-Consist of two polynucleotide chains
-Each chain form a right-handed helical spiral
-And the two chains coil around each other to form a double helix
-The chains run in opposite directions, that is antiparallel (5’end-3’ end/ 3’end-5’end0
-Each chain has a sugar phosphate backbone with the base which project at right angles
-The bases are purine (adenine and guanine), pyrimidine (cytosine and thymine)
-And hydrogen bond with bases of the opposite chain
-DNA is the genetic material of all living organisms and many viruses.
-Always within the nucleus and it has less one oxygen atom than RNA

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