Explain how genetic information can be stored in a sequence of nitrogenous bases in DNA.
DNA is a large biological chemical which is a polymer found in chromosomes and genes and stores our hereditary information.
A sub-unit of DNA is called a nucleotide which consists of a phosphate group, a five-carbon sugar called deoxyribose and one of four nitrogenous bases. These are called adenine, guanine, cytosine and thymine.
DNA exists as a double-helix which is a double stranded molecule resembling a twisted ladder. Two nucleotides are held together by their nitrogenous bases in the center by hydrogen bonds. Bases are complementary and pair according to the following rules- adenine pairs to thymine and cytosine to guanine.
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