Chapter 8, Problem 21P

A mutant strain of Salmonella bacteria carries a mutation of the rho protein that has full activity at $\text{37°C}$ but is completely inactivated when the mutant strain is grown at $\text{40°C}$.

a. Speculate about the kind of differences you would expect to see if you compared a broad spectrum of mRNAs from the mutant strain grown at $\text{37°C}$ and the same spectrum of mRNAs from the strain when grown at $\text{40°C}$.

b. Are all mRNAs affected by the rho protein mutation in the same way? Why or why not?