A MAC plate (MacConkey agar) is a ___________  type of media A)    SelectiveB)    DifferentialC)    Selective and differential

8) In a catalase test, bubbles indicate that __________ has been produced A)    H2O2B)    CO2C)    O2D)    H2

11) Which stain is commonly used for endospore staining? A)     Malachite GreenB)     CarbolfuchsinC)     Crystal violetD)     Methylene blue

 T or F  The Gram-negative cell wall is composed of more peptidoglycan than a Gram positive cell wall.

What are the main steps to making sure your sample remains uncontaminated while you inoculate a plate or broth tube, that also maintains an aseptic area for you and the lab?

Show your work: Suppose you are given a suspension of Staph. aureus broth culture and told to make a 1:100 dilution of the entire culture, (use a 100 mL final volume).   How much of the starter culture would you add and how much media would you add, to get a final volume of 100mL?

37)  Which of the following microbes is likely to give a positive result in a catalase test?   A) Staphylococcus aureus B) Streptococcus pyogenes            

16) Which of the following media types tests for the production of H2S A)    TSIAB)    MSAC)    BEAD)   MAC

13) A procedure used to separate bacteria into two main groups based on cell wall structure A)    Acid fast stainB)    Gram stainC)    Endospore stainD)    Peptidoglycan test

26) The chromophore component of a basic dye has what type of charge (hint- this charge allows it to bind to the cell surface of most bacterial cells). A)    PositiveB)    Negative