Module 3 questions from Lawrence, Chapter 3 & 4:

3.5 Zingaki izinyanga eziphakathi kokuvalwa kwalo mncintiswano nokumenyezelwa komphumela? Bhala ngesiZulu impendulo yakho. (1)

You inoculate a MSA plate with Staphylococcus epidermidis. After 24 hours of incubation at 37C, you observe white growth on pink media. This means that:

Module 4 lecture questions:

You are asked to inoculate two TSA plates by placing a loopful of culture in the center: one with Proteus mirabilis and another with Staphylococcus epidermidis. In what way will the plates look different from one another after incubation for 24 hours at 37C? Why?    

3.4 Oyophuma phambili uyomenyezelwa nini? (1)

Module 1 lecture questions:

Using your own words, please briefly define the concept of craving. 

4.2 Kubaluleke ngani ukonga amanzi nogesi ngokucabanga kwakho? (2)

A 1g sample of raw spinach is liquefied and mixed with 99ml of sterile water.  1ml of the diluted sample is then added to 9ml of sterile water.  This dilution is then diluted by two successive 1/10 dilutions.  0.1ml of this serially diluted sample is then spread on a TSA plate. 72 CFUs are counted on the plate after 24 hours of incubation at 37C. What was the original concentration of bacteria in the food sample? (Type your final, simplified, answer below with proper units. You can submit your work on paper after this quiz per the instructions on the quiz).