S51C inal Exam (Microbiology 50 Questions With
P
100% OI're ANswer ate ndate aded A
Question 1 What microbial process was responsible for changing Earth’s atmosphere fromone without
Correct oxygen to one with oxygen?
5.00 points outof
5.00 Select one:
a. anaerobic respiration
b. decomposition
c. oxygenic photosynthesis o
d. temperature regulation
Question 2
In the nitrogen cycle, which of the following phases involves the release of nitrogenas
Correct
5.00 points outof N2z
5.00
into the Earth’s atmosphere?
Select one:
a. ammonification
b. denitrification V4
c. nitrification
d. nitrogen fixation
, Question 3 Farmers commonly inoculate legume crops with Rhizobium bacteria for which ofthe
Incorrect following purposes?
0.00 points outof
5 00 Select one:
a. The bacteria cause the crops to use less water and, therefore, be moredrought-
resistant.
b. The bacteria kill off other, more virulent, bacteria that are harmful to thecrops
c. The bacteria secrete a chemical that inhibits the growth of unwanted weeds.
X
d. The two form a symbiotic relationship increasing the plant’s access tonitrogen.
Question 4 In the secondary phase of wastewater treatment, why is air injected into the sludgeas it is
Incorrect stirred and recirculated?
0.00 points outof
5.00 Select one:
a. The bioremediators need oxygen.
b. The air lowers the pH of the solution.
c. The air keeps the sludge from clogging the pipes. %
d. Oxygen kills the bacteria in the water.
Question 3 Which of the following microorganisms is used to make yogurt?
Incorrect
0.00 points outof Select one:
5.00 a. Lactobacillus bulgaricus
b. Pennicillium roqueforti
c. Streptococcus lactis
d. Yeast %
P
100% OI're ANswer ate ndate aded A
Question 1 What microbial process was responsible for changing Earth’s atmosphere fromone without
Correct oxygen to one with oxygen?
5.00 points outof
5.00 Select one:
a. anaerobic respiration
b. decomposition
c. oxygenic photosynthesis o
d. temperature regulation
Question 2
In the nitrogen cycle, which of the following phases involves the release of nitrogenas
Correct
5.00 points outof N2z
5.00
into the Earth’s atmosphere?
Select one:
a. ammonification
b. denitrification V4
c. nitrification
d. nitrogen fixation
, Question 3 Farmers commonly inoculate legume crops with Rhizobium bacteria for which ofthe
Incorrect following purposes?
0.00 points outof
5 00 Select one:
a. The bacteria cause the crops to use less water and, therefore, be moredrought-
resistant.
b. The bacteria kill off other, more virulent, bacteria that are harmful to thecrops
c. The bacteria secrete a chemical that inhibits the growth of unwanted weeds.
X
d. The two form a symbiotic relationship increasing the plant’s access tonitrogen.
Question 4 In the secondary phase of wastewater treatment, why is air injected into the sludgeas it is
Incorrect stirred and recirculated?
0.00 points outof
5.00 Select one:
a. The bioremediators need oxygen.
b. The air lowers the pH of the solution.
c. The air keeps the sludge from clogging the pipes. %
d. Oxygen kills the bacteria in the water.
Question 3 Which of the following microorganisms is used to make yogurt?
Incorrect
0.00 points outof Select one:
5.00 a. Lactobacillus bulgaricus
b. Pennicillium roqueforti
c. Streptococcus lactis
d. Yeast %
