noun🔗ShareAcide ribonucléique, ARNA derivative of DNA having ribose in place of deoxyribose, and uracil in place of thymine; its primary function is in the transcription of genetic material and subsequent synthesis of protein.""The instructions from DNA are copied into a type of genetic material called ribonucleic acid, or RNA, which then helps the cell build proteins." "Les instructions de l'ADN sont copiées dans un type de matériel génétique appelé acide ribonucléique, ou ARN, qui aide ensuite la cellule à fabriquer des protéines.biochemistrybiologycompoundmedicinesubstanceorganismphysiologyfunctionChat with AIVocabulary GamePractice Reading