Deck 27: Environmental Microbiology

Question 1

Figure 27.1

Where are eukaryotic algae most likely to be found in Figure 27.1?

A) A
B) B
C) C
D) A and B
E) B and C

Answer 1

A

Question 2

Nitrogen fixation

A) Requires aerobic conditions.
B) Requires anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Answer 2

B

Question 3

Residual chlorine must be maintained in

A) Anaerobic sludge digestion
B) Primary sewage treatment
C) Secondary sewage treatment
D) Tertiary sewage treatment
E) Water treatment

Answer 3

E

Question 4

Filtration to remove protozoa occurs in

A) Anaerobic sludge digestion.
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment.

Question 5

Which of the following is not a symbiotic pair of organisms?

A) Elk and rumen bacteria
B) Bean plant and Rhizobium
C) Orchid and mycorrhizae
D) Onions and arbuscules
E) Sulfur and Thiobacillus

Question 6

$6 \mathrm{H}_{2} \mathrm{~S}+6 \mathrm{CO}_{2} \stackrel{\text { light }}{\longrightarrow} 6 \mathrm{~S}^{0}+$ glucose

-Sludge digestion

A) Takes place under aerobic conditions.
B) Takes place under anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Question 7

Coal formation

A) Requires aerobic conditions.
B) Requires anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Question 8

Which of the following equations represents anaerobic respiration?

A) Amino acids -H₂S
B) SO₄₂- -Amino acids
C) H₂S -S0
D) NO₃- -NO₂-
E) None of the above

Question 9

Which of the following is an assimilation process?

A) Thiobacillus: H₂S -S0
B) Desulfovibrio: SO₄₂- -H₂S
C) Redwood tree: SO₄₂- -Amino acids
D) Proteus: Amino acids -H₂S
E) None of the above

Question 10

Aerobic respiration occurs in

A) Anaerobic sludge digestion.
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment.

Question 11

The product of which process contains the highest BOD?

A) Anaerobic sludge digestion
B) Primary sewage treatment
C) Secondary sewage treatment
D) Tertiary sewage treatment
E) Water treatment

Question 12

Which of the following is not a habitat for an extremophile?

A) Acid mine wash
B) 100°C water
C) The Atlantic Ocean
D) Inside rock
E) Salt- evaporating pond

Question 13

Which of the following organisms is using sulfur as a source of energy?

A) Thiobacillus: H₂S -S0
B) Desulfovibrio: SO₄₂- -H₂S
C) Redwood tree: SO₄₂- -Amino acids
D) Proteus: Amino acids -H₂S
E) None of the above

Question 14

Most of the microorganisms in the soil are found at a depth

A) Between 65 and 75 cm.
B) Between 20 and 25 cm.
C) Between 3 and 8 cm.
D) Between 35 and 40 cm.
E) Evenly distributed from the surface to 76 cm.

Question 15

All of the following are true about releasing untreated sewage into a river except

A) It decreases the dissolved oxygen.
B) It increases the BOD.
C) It is a health hazard.
D) It kills bacteria.
E) None of the above.

Question 16

A trickling filter

A) Requires aerobic conditions.
B) Requires anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Question 17

Sedimentation of sludge occurs in

A) Anaerobic sludge digestion
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment

Question 18

In one hospital, Pseudomonas aeruginosa serotype 10 infected the biliary tract of 10% of 1300 patients who underwent gastrointestinal endoscopic procedures. After each use, endoscopes were washed with an automatic reprocessor that flushed detergent and glutaraldehyde through the endoscopes followed by a tap water rinse. P. aeruginosa 10 was not isolated from the detergent, glutaraldehyde, or tap water. What was the source of the infections?

A) A biofilm in the reprocessor
B) Fecal contamination of the bile ducts
C) Bacterial cell walls in the water
D) Contaminated disinfectant

Question 19

Primary sewage treatment

A) Takes place under aerobic conditions.
B) Takes place under anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Question 20

Figure 27.1

Where are photosynthetic bacteria most likely to be found in Figure 27.1?

A) A
B) B
C) C
D) A and B
E) B and C

Question 21

Nitrosomonas and Nitrobacter are capable of

A) Ammonification.
B) Denitrification.
C) Nitrification.
D) Nitrogen fixation.
E) None of the above

Question 22

The bacteria contributing most of the bacterial biomass to soil are

A) Coliforms.
B) Rhizobiaceae.
C) Actinomycetes.
D) Photoheterotrophs.
E) Chemoautotrophs.

Question 23

Rotating biological contactor are used in

A) Anaerobic sludge digestion.
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment.

Question 24

Which of the following do not fix atmospheric nitrogen?

A) Cyanobacteria
B) Azotobacter
C) Frankia
D) Mycorrhizae
E) Lichens

Question 25

In which of the following animals would you expect to find a specialized organ that holds cellulose- degrading bacteria and fungi?

A) Wolf
B) Human
C) Cat
D) Termite
E) Dog

Question 26

The release of phosphate- containing detergents into a river would

A) Kill algae.
B) Kill bacteria.
C) Increase oxygen in the water.
D) Increase algal growth.
E) None of the above.

Question 27

Bacteria can increase the Earth's temperature by

A) Producing CH4, which is a greenhouse gas.
B) Using the greenhouse gas CO₂.
C) Providing nutrients for plant growth.
D) Oxidizing CH4.
E) Generating a great deal of heat in metabolism.

Question 28

Which of the following terms describes NO₃- -N2?

A) Ammonification
B) Denitrification
C) Nitrification
D) Nitrogen fixation
E) None of the above

Question 29

This process is done by Rhizobium and certain cyanobacteria:

A) Ammonification
B) Denitrification
C) Nitrification
D) Nitrogen fixation
E) None of the above

Question 30

Anaerobic respiration occurs in

A) Anaerobic sludge digestion.
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment.

Question 31

Eighty- one percent of the microorganisms in the soil are

A) Algae
B) Fungi.
C) Actinomycetes.
D) Protozoa.
E) Bacteria.

Question 32

Which of the following terms describes NH₃ -NO₂- -NO₃- ?

A) Ammonification
B) Denitrification
C) Nitrification
D) Nitrogen fixation
E) None of the above

Question 33

The bacteria that grow first in the microbial succession in a compost pile are

A) Aerobic thermophiles.
B) Anaerobic psychrophiles.
C) Anaerobic mesophiles.
D) Aerobic mesophiles.
E) None of the above.

Question 34

Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

A) Anaerobic sludge digestion
B) Primary sewage treatment
C) Secondary sewage treatment
D) Tertiary sewage treatment
E) Water treatment

Question 35

NH₃ ?NO?-

A) Takes place under aerobic conditions.
B) Takes place under anaerobic conditions.
C) The amount of oxygen doesn't make any difference.

Question 36

Which of the following terms describes Amino acids (- NH₂) -NH₃?

A) Ammonification
B) Denitrification
C) Nitrification
D) Nitrogen fixation
E) None of the above

Question 37

Which of the following terms describes N2 -NH₃?

A) Ammonification
B) Denitrification
C) Nitrification
D) Nitrogen fixation
E) None of the above

Question 38

The addition of untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

A) Decrease.
B) Increase.
C) Stay the same.
D) Can't tell.

Question 39

Which of the following pairs is mismatched?

A) Rhizobium - legumes
B) Bacillus thuringiensis - insect control
C) Thiobacillus ferrooxidans - uranium mining
D) Lichen - an alga and a bacterium
E) Frankia - alders

Question 40

Zoogloea form flocculent masses in

A) Anaerobic sludge digestion.
B) Primary sewage treatment.
C) Secondary sewage treatment.
D) Tertiary sewage treatment.
E) Water treatment.

Question 41

Biochemical oxygen demand is a measure of

A) The amount of oxygen present in a water sample.
B) The amount of undissolved solid matter present in a water sample.
C) The amount of organic matter present in a water sample.
D) The number of bacteria present in a water sample.
E) All of the above.

Question 42

Which wastewater treatment process produces BOD- containing effluent used for irrigation?

A) Anaerobic sludge digestion
B) Primary sewage treatment
C) Secondary sewage treatment
D) Tertiary sewage treatment
E) Water treatment

Question 43

Bioremediation of petroleum

A) Takes place under aerobic conditions.
B) Takes place under anaerobic conditions.
C) The amount of oxygen doesn't make any difference.