Name the pathogenic organism responsible for tuberculosis.
The real length of the cell between X and Y in Fig. 3.1 is $2\,\mu\text{m}$. Calculate the magnification of the electron micrograph. Show your working and give the answer to the nearest whole number.
The organism that causes tuberculosis is a prokaryote. State three characteristics of prokaryotes.
State one factor, other than drug therapy, that helped bring about the steady decline in the number of new cases of tuberculosis.
Outline three reasons why, in many developed countries, the number of new cases of tuberculosis is now rising.
Suggest two ways in which streptomycin acts at ribosomes to inhibit protein synthesis.
Streptomycin does not harm mammalian cells. Suggest an explanation for this.