Dna is linked to all body functions because it is the genetic material which contains all the genetic information about our whole body.
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The operon is effectively the center of transcriptional control. In addition to its main structural genes, the operon houses an operator and a promoter. In front of the promoter lies a regulatory gene that produces repressor proteins. When a repressor is in its active state, it binds to the operator.
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Well your body is made up of mostly water and can damage your body because of dehydration