Microbiology Lab Report 4 – Spring 2016
1. What is the color of endospores after Gram staining?
2. What is the color of endospores after Spore staining?
3. Of the three genera of bacteria, which does not produce endospores? A.
Clostridium B. Mycobacterium C. Bacillus
4. What makes Mycobacterium resistant to staining?
5. Differentiate between the following types of movement observed in a wet
mount or hanging drop slide:
a. Directional motility
b. Brownian movement
c. Water current movement
6. What concentration of agar is used in a semisolid medium for motility
determination? How does that compare to a typical solid medium (See
Exercise 19). Explain.
7. What biological molecules can make up the bacterial capsule or glycocalyx?
8. A student heat-fixes their smear intended for capsule staining. What result
might the student expect?