One of the most unusual aspects of virus particles is the absence of all organelles and other smaller structures. Whereas cells
have many kinds of organelles, viruses consist of only two parts: a nucleic acid core made of DNA or RNA, and a tough, potective protein shell. Which name is given to this tough shell made of protein?
When a scientist say's organisms have the same universal genetic code it mainly means that the "organisms use the same four nucleotide bases." Now <span>organic molecules that serve as the monomer units for forming the nucleic acid polymers.
