You Are a Research Assistant in a Lab That Studies

Multiple Choice

You are a research assistant in a lab that studies nucleic acids. Your advisor gave you four tubes for analysis. Each of these tubes differs in its contents by the source of its nucleic acids: mouse cytoplasm (single-stranded RNA) , yeast nuclei (double-stranded DNA) , rotavirus (double-stranded RNA) , and parvovirus (single-stranded DNA) . The approximate nucleotide base composition of each sample is given in the table below. $$\begin{array} { | l | r | r r r | r } \hline \text { Tube } & \text { A } & \mathbf { C } & \text { U } & \text { T } & \mathbf { G } \\\hline 1 & 32 & 17 & 0 & 32 & 19 \\\hline 2 & 34 & 16 & 15 & 0 & 35 \\\hline 3 & 30 & 21 & 0 & 26 & 23 \\\hline 4 & 33 & 16 & 34 & 0 & 17 \\\hline\end{array}$$
-Which samples would be destroyed by a DNase?

A) tubes 1 and 3
B) tubes 2 and 4
C) tubes 1 and 2
D) tubes 3 and 4
E) all the tubes