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Microbiology (2060) > Module 27: Environmental Microbiology > Flashcards

Module 27: Environmental Microbiology Flashcards

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Biology 101 flashcards
1
Q

What is the starting reactant in photosynthesis?

A

Carbon dioxide

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2
Q

What causes global warming?

A

Increase in atmospheric carbon dioxide

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3
Q

What percentage of Earth’s atmosphere is made of molecular nitrogen?

A

80%

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4
Q

What molecules are broken down during deamination?

A

Amino acids

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5
Q

What process is the oxidation of ammonia to produce nitrate?

A

Nitrification

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6
Q

What process converts nitrates into gaseous nitrogen?

A

Denitrification

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7
Q

What structure of cyanobacteria carries their nitrogenase enzymes?

A

Heterocysts

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8
Q

What is the term for using microbes to detoxify or degrade pollutants?

A

Bioremediation

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9
Q

What is the predominant fecal coliform?

A

Escherichia coli

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10
Q

What sewage system is used for homes in low population areas?

A

Septic system

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11
Q

What process is characterized by passing water through 2-4 feet of sand or gravel to clean it?

A

Filtration

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12
Q

What are the 3 methods of disinfecting water?

A

Ozone
UV light
Chlorine

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13
Q

What are 3 types of secondary sewage treatments?

A

Trickling filters
Rotating biological contactor
Activated sludge system

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14
Q

What are the important microbes in sludge granules of activated sludge systems?

A

Zoogloea

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15
Q

What process is characterized by taking nitrogen from the atmosphere and placing it in soil?

A

Nitrogen fixation

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16
Q

What genus of bacteria is known for nodulation and development of an anaerobic environment?

A

Rhizobium

17
Q

What step in sewage treatment includes removal of solids?

A

Primary treatment

18
Q

What step in sewage treatment includes activated sludge?

A

Secondary treatment

19
Q

What type of environment does trickling filter treatment require?

A

Aerobic

20
Q

What can happen if large amounts of phosphate-containing detergents are released into a body of water?

A

Increase in algal growth

21
Q

What should the BOD amount do as sewage is treated?

A

Decrease

Microbiology (2060) (21 decks)

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