What group of microbes generates oxygen through photosynthesis? 

If antibiotics kill off much of the normal intestinal flora what pathogen becomes a big problem? 

Which disease has been eradicated?

In what process is pyruvate reduced by NADH to form various products depending on the organism?  

What would be the result of a point mutation in a protein-coding gene? 

Name a specific structure recognized by Toll like receptors.  

 Contrast Gram positive and Gram negative cells. What parts of the cell wall are different? 

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

In a chemical reaction, which parameter is affected by the presence of an enzyme?  

In a DNA double helix where are the phosphates?