Answer:
DNA is the basis for life on planet Earth—every living thing has it. The function of DNA is to store all of the genetic information that an organism needs to develop, function, and reproduce. Essentially, it is the biological instruction manual found in each of your cells.
The instructions in DNA are written in a simple alphabet that has just four letters—A, T, C, and G. Now of course, these are not really letters. Instead they are molecules called nitrogenous bases that are part of a larger molecule called a nucleotide that forms the basic building block of DNA. The letters of the alphabet are really just abbreviations for the nitrogenous bases: adenine (A), thymine (T), guanine (G), and cytosine (C).
The function of DNA is tied to its structure. which is helpful to review in order to understand its function. As stated above, the basic building blocks of DNA are nucleotides. These nucleotides are composed of a five-carbon sugar, a phosphate group, and a nitrogenous base. The sugars and phosphates link the nucleotides together to form each strand of DNA. When two strands of DNA come together, base pairs form between the nucleotides of each strand.
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