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Best Answer: DNA or known as Deoxyribonucleic Acid consists of two chains, strands composed of a large number of chemical compounds, called nucleotides, linked together to form a chain.These chains are arranged like a ladder that has been twisted into the shape of a winding staircase, called a double helix.est Answer: DNA or known as Deoxyribonucleic Acid consists of two chains, strands composed of a large number of chemical compounds, called nucleotides, linked together to form a chain.
This contains all of our genes. DNA, itself is made up of four chemical bases, pairs of which form the rungs of the twisted, ladder-shaped DNA molecules. These four molecules are adenine (A), thymine (T), cytosine (C), and guanine (G). All genes are made up of stretches of these four bases (arranged in different ways and in different lengths). Photo: National Institute of Health. A critical feature of DNA is the ability of the nucleotides to make specific pairs: .