I agree about not getting too excited. But to be precise in this case they are talking about nucleobases [1] which are building blocks of DNA. Amino acids [2] a

I agree about not getting too excited. But to be precise in this case they are talking about nucleobases [1] which are building blocks of DNA. Amino acids [2] are building blocks of proteins. [1] - http://en.wikipedia.org/wiki/Nucleobase http://en.wikipedia.org/wiki/Nucleobase [2] - http://en.wikipedia.org/wiki/Amino_acid http://en.wikipedia.org/wiki/Amino_acid