What is a nosocomial infection? 

Which statement is true?   

Which group is referred to in the following descriptions?   

You try growing an uncharacterized strain of E. coli. You find it grows well on rich (non-synthetic) media but will not grow on minimal (synthetic) media. However, it will grow on minimal media plus histidine. What do you conclude?   

What groups have 70s ribosomes?    

 Define endosymbiosis. Present one piece of evidence (Why do we believe this is true?) that endosymbiosis was important in evolution. 

What organism makes the antibiotics tetracycline, chloramphenicol, and erythromycin?  

Name any common-source epidemic. If it is not something that everyone is aware of describe why it is a common-source epidemic

What conditions lead a bacterium to produce a spore?

This group of viruses includes the one that causes cold sores. The drug acyclovir targets a member of this group.