The most common analogy used to compare the science of DNA to other industries is that of computer software. DNA can be viewed as a series of commands (genes) that are coded in four nucleotides (represented by A, G, C, and T). Those letters are interpreted by the cellular machinery to produce cell products like enzymes, proteins, and various building blocks of the cell itself. This code somewhat parallels the “machine language” of computers. Computer’s lists of commands (coded in zeros and ones) are interpreted to work with numbers or any type of information that is converted to numbers (like audio, video, or sensor data). Resulting numbers generate numerical output for machinery such as screen displays, motors, tools, robots, digital controls, etc.
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