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?

Question

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?

Quizplus · Accepted Answer

Tubes 1 and 3 contain DNA, as indicated by the presence of thymine (T) and absence of uracil (U), and would be destroyed by a DNase.

You Are a Research Assistant in a Lab That Studies