MCB2289 Introduction to Microbiology
Module 3 Homework Assignment
•Use the information presented in the module folder along with your readings from the textbook to answer the following questions.
1.Define the following terms: sterilization, disinfection, and sanitization. How are each of these terms different from one another?
2.Compare and contrast selective media and differential media. Give examples of each type of media:
3.Define the following terms used to describe bacterial morphology or bacterial arrangements andgive examples of SPECIFIC organisms that are representatives of each category of MorphologyANDArrangements. For example: an example of a cocci organism is Staphylococcus aureus
a) Morphology:
1. Cocci –
2. Bacilli –
3. Vibrios
4. Spirilla
5. Spirochete–
b) Arrangements:
1. Diplo –
2. Strepto-
3. Staphlo-
4.Describe the four (4) different stages of the bacterial population growth curve:
5. Describe briefly how the following factors influence microbial growth:
a) Temperature
b) pH
c) Osmotic Pressure
d) Atmospheric conditions (presence or absence of oxygen)
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