Insert a blank disc. If Burn Playlist to Disc doesnât appear in the menu, the playlist you selected canât be burned to a CD because it contains items with usage restrictions (for example, a song your computer isnât authorized to play). Select a disc format.
well i am not sure what are you asking but if you think the units that form DNA and RNA then the answer would be NUCLEOTIDES ...there are 4 types of nucleotide ... ADENINE THYMINE GUANINE CYTOSINE in case of DNA and in case of RNA THYMINE is substituted with URACIL. Arizona D Â· 7 years ago.
1 DNA is a double stranded molecule while RNA is a single stranded molecule. 2  DNA is stable under alkaline conditions while RNA is not stable. 3  DNA and RNA perform different functions in humans.