Messiah

BIOL MISC

Chapter 6: Microbial Growth

1)Classify microbes into five groups on the basis of preferred temperature change.

 

 

2. Identify how and why the pH of culture media is controlled.

 

3. Explain the importance of osmotic pressure to microbial growth.

 

4. Provide a use for each of the four elements (C, N, S, P) needed in large amounts microbial growth.

 

5. Explain how microbes are classified on the basis of oxygen requirements.

 

 

 

 

6. Identify ways in which aerobes avoid by toxic forms of oxygen.

(pwr. Point 22)

•  

2

Singlet oxygen: ¹O ⁻ boosted to a higher-energy state

• Superoxide free radicals: O₂

 

2

              Peroxide anion: O 2–

• Hydroxyl radical (OH•)

 

7. Justify the use of each of the following:

anaerobic techniques:

 

Cultural media:

• Culture medium: