How many unique DNA and RNA nucleotides are found in Nature - My initial thought was 5; Cytosine, Thymine, Adenine, Uracil, and Guanine. But the key says I'm wrong, I'm hoping this is a typo? 

6 minutes ago, Vet track said:

How many unique DNA and RNA nucleotides are found in Nature - My initial thought was 5; Cytosine, Thymine, Adenine, Uracil, and Guanine. But the key says I'm wrong, I'm hoping this is a typo? 

I think you are right. But can you give us the exact wording of the question, maybe it is asking something subtly different.

Maybe the question meant for each: 4 for DNA(Adenine, Cytosine, Guanine, Thymine), and 4 for RNA(Adenine, Cytosine, Guanine, Uracil)

There are many minor bases (for example pseudo-uracil), although I doubt that one wold be expected to know their exact number.