Bacteria that are obligate aerobes carry out respiration that includes an electron transport chain that normally uses _____ as the final electron acceptor.

H₂O₂ production by bacteria during respiration can be harmful to the bacterial cells.

Which culture medium is used to determine if bacteria ferment a carbohydrate such as glucose?

The photograph below illustrates a positive test for the presence of what enzyme that bacteria use to break down hydrogen peroxide?

Which of the following is a substance that is normally NOT produced by bacterial fermenters?

One of the microorganisms you are using in laboratory exercise 1-5 on streak plate methods is Serratia marcescens. You used that in the laboratory exercise on epidemic simulation in which some students in the class transmitted that microorganism to others on their gloves. You looked for colonies of this microorganism on your plate after it was incubated. What color of colonies do you expect to see in laboratory exercise 1-5 if you  isolate that bacterium on your plate?

The main purpose behind performing laboratory exercise 6-1 on environmental sampling in your laboratory was to determine the effectiveness of your disinfection technique and the effectiveness of the surface disinfectant used on the surface you selected for your test.

The circled structures on the plate in the photograph below are known as colony-forming units.

The correct method for sampling an environmental surface with a RODAC plate is:

Usually the first step in identifying a microorganism from a patient specimen in the medical laboratory is to: