Ans. Genetic information is stored in DNA through the arrangement of nucleotides. DNA is made up of a sequence of nucleotides, which are composed of a sugar, a phosphate group, and a nitrogenous base. The order of the nitrogenous bases, adenine (A), thymine (T), cytosine (C), and guanine (G), determines the genetic code. The specific sequence of these bases along the DNA molecule carries the instructions for building and maintaining an organism.