Compared to other microbes, the pathogenic bacterium Staphylococcus aureus is relatively resistant to the damaging effects of hydrogen peroxide. This is partly because it has multiple catalase enzymes, including KatG, to break down peroxide. This diagram illustrates how KatG is regulated in S. aureus.

Yersinia enterocolitica is a bacterium that causes serious food-borne illness. During infection, Y. enterocolitica tightly attaches to intestinal epithelial cells (IECs).  This experiment compares the ability of 3 Y. enterocolitica strains to attach to IECs.  “The ability of wild type Y. enterocolitica (WT), a yadA mutant, and a complement strain to attach to IECs was measured.” What does this experiment show about the YadA protein? 

Which of the following is equal to 2000 millimeters?

The rate of change of velocity of an object going in a certain direction is termed…

Which disease is contracted by the highest number of health care workers each year?

A kilocalorie is the amount of heat required to raise __________ of water at room temperature by ___________.

If the temperature outside is 0 degrees Celsius, what is the equivalent in Fahrenheit?

Heat is thermal energy which derives from

Bordetella pertussis is the bacterial pathogen that causes whooping cough, a serious respiratory tract infection most common in unvaccinated children. The data below are from an attachment assay with wild type B. pertussis (WT), two different deletion mutants, and a plasmid complement strain. The assay was done for two different host cell types. Which of the following is a B. pertussis adhesin?

Adenovirus 5, a common cause of colds, has special fiber proteins on its surface that allow it to bind to a receptor called CAR on human epithelial cells. Once it binds to CAR, adenovirus 5 can enter the cell. This most directly contributes to…