Essential Genetics 6th Edition by Daniel Hartl

Exercise 5

A friend brings you three samples of nucleic acid and asks you to determine each sample's chemical identity (whether DNA or RNA) and whether the molecules are double-stranded or single-stranded. You use powerful nucleases to degrade each sample completely to its constituent nucleotides and then determine the approximate relative proportions of nucleotides. The results of your assay are shown here. What can you tell your friend about the nature of these samples?