This triplet genetic code is actually conferred in the biology of using DNA to make proteins through an intermediate, RNA; RNA, or ribonucleic acid, is composed of three of the same nucleotides as DNA: adenosine, cytosine, and guanine, and with uracil replacing thymine. DNA is copied into RNA in a process called transcription. This is easy to remember, since DNA and RNA are "written" in the same "language" of nucleotides. RNA is then used as a template to make a protein in a process called translation. This makes sense, as RNA and proteins are "written" in different "languages" (nucleotides and amino acids, respectively). The transcription of DNA into RNA, which can then be translated into proteins is called The Central Dogma of biology.