Blog

A patient went to the ER with severe wound infection of the leg after swimming in a lake.  Gram staining of a sample from his wound showed the following results.  Based on this picture, the bacteria isolated from the wound can be described as which of the following?

  —————- cells have a thin layer of peptidoglycan, while ————— cells have a thick layer of peptidoglycan in their cell walls.

In an experiment, 1 mL of a bacterial sample was serially diluted with 9 mL of water.  1 mL of each dilution was plated on nutrient agar and incubated at an appropriate temperature to visualize colonies.   Based on the following scheme of dilution, which answer best describes the bacterial concentration ( CFU/mL) in the original sample? 

Which of the following statements about the organism shown in the picture is true?  

Upload your work for Quiz 02 in one single pdf file.

You are given a sample of bacteria at a concentration of 3 x 106 CFU/mL.  After mixing the sample , you transfer 1 mL into 99 mL of fresh media and label this Tube 1.  You mix the contents of Tube 1 and transfer 1 mL into 9 mL of fresh media and label this Tube 2.  Based on this dilution scheme, the estimated CFU/mL of  bacteria in Tube 2 should be:

A generic drug name:

An athlete wants to know how fast a particular medication will be eliminated from the body. An important parameter to review in this case would be the:

A combination of 2 drugs is used in the treatment of a disease. This combination produces a greater effect than would be predicted by adding the effects of the individual drugs. This combination produces a(n):

When discussing the role of exercise and medicine with the coach of your track team, you can say that exercise can increase the duration of action of some drugs that are metabolized by the liver because: