Bio, Ch 11 Flashcards | Quizlet Characteristics of DNA - deoxyribose - adenine pairs with thymine - double stranded - double helix Characteristics of rRNA - ribosomal RNA - joins proteins to form the two subunits of a ribosome. - produced in the nucleolus - site of protein synthesis Characteristics of mRNA - Messanger RNA - Carries genetic information from nucleus to cytoplasm.