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A gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis. gene (def) is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis.
DNA is not used to make proteins directly. Translating the genetic code of DNA involves another type of molecule, RNA. RNA, or ribonucleic acid, carries the information from DNA to a ribosome, where the amino acids are brought together to form a protein. DNA actually codes for RNA.