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Problem: Characteristics of Azotobacter Azotobacter is a genus of bacteria that live in soil and have the following characteristics: They are bacilli.They are gram-negative.They are obligate aerobes. They can fix nitrogen. (Unlike some other nitrogen-fixing bacteria, which associate with the roots of plants, Azotobacter species are free-living.)Select the four statements that are true for bacteria in the genus Azotobacter. a. They are poisoned by O2. b. They appear purple after Gram staining. c. They have a relatively thin layer of peptidoglycan in their cell wall. d. They require amino acids or other organic molecules as a source of nitrogen. e. They use O2 for cellular respiration. f. They can carry out anaerobic respiration in an environment that lacks O2. g. They are shaped like rods. h. They have the appearance of coils or corkscrews. i. They can convert atmospheric nitrogen to ammonia.

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Characteristics of Azotobacter 

Azotobacter is a genus of bacteria that live in soil and have the following characteristics: 

  • They are bacilli.
  • They are gram-negative.
  • They are obligate aerobes. 
  • They can fix nitrogen. (Unlike some other nitrogen-fixing bacteria, which associate with the roots of plants, Azotobacter species are free-living.)

Select the four statements that are true for bacteria in the genus Azotobacter. 

a. They are poisoned by O2

b. They appear purple after Gram staining. 

c. They have a relatively thin layer of peptidoglycan in their cell wall. 

d. They require amino acids or other organic molecules as a source of nitrogen. 

e. They use O2 for cellular respiration. 

f. They can carry out anaerobic respiration in an environment that lacks O2

g. They are shaped like rods. 

h. They have the appearance of coils or corkscrews. 

i. They can convert atmospheric nitrogen to ammonia.

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Based on our data, we think this problem is relevant for Professor Yeargain's class at UCF.