How many times do you place your sterile loop into the stock culture of bacteria when performing a streak plate?

View the Acid-fast stain below: What conclusion can be drawn about the majority of the cells present in this sample?  

For each characteristic listed below, indicate whether it is a property of Gram-positive bacteria, Gram-negative bacteria, or both. Has a thin layer of peptidoglycan [a] Has an outer membrane [b] Contains teichoic acid [c] Contains lipopolysaccharide [d] Has a periplasmic space [e] Has a cytoplasmic membrane [f] Has a thick layer of peptidoglycan [g] Contains lipoteichoic acid [h]    

Based on the growth patterns on the agar plates: Identify the temperature class of species B: [a] Give an example of an organism that belongs in the same temperature class as species B: [b].  (write out full genus and species)  

What is the function of the microscope part?  

An organism that does not lyse red blood cells is [a] hemolytic. An example of an organism that has this hemolysis pattern is [b].

What does “CFU” stand for?

What is the function of the microscope part?  

What does “CFU” stand for?

When switching from the 10X objective to the 40X objective, which focus knob do you use to refocus?