A gene is a small section of DNA?<span> that contains the instructions for a </span>specific<span>molecule, usually a </span>protein?. The purpose of genes?<span> is to store information. Each gene contains the information required to build </span>specific proteins<span> needed in an organism. The human genome</span>?<span> contains 20,687 </span>protein<span>-coding genes.</span>
The last option is the most accurate
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