quiz 5 Flashcards
In denitrification, when O2 is low, _________is used as an electron acceptor
A. CO2
B. O2
C. N2
D. NO3-
D. NO3-
What are the correct order of steps in the denitrification process?
a) NO b) N2 c) NO3- d) NO2-
A. b, c, d, a
B. a, b, c, d,
C. d, c, b, a
D. c, d, a, b
D. c, d, a, b
In the oceans, prokaryotes are greatly outnumbered by
A. viruses.
B. Phytoplankton
C. diatoms.
D. zooplankton.
A. viruses.
What is the most abundant compound in nature when dimethylsulfoniopropionate (DMSP) is aerobically degraded in a marine environment?
A. Diethyl sulfoxide
B. Dimethyl sulfide
C. Acrylate
D. Methanethiol
B. Dimethyl sulfide
The primary energy source for termites comes from
A. methanogenic Bacteria.
B. acetogenic Bacteria.
C. methanogenic Archaea.
D. acetogenic Archaea.
B. acetogenic Bacteria.
Gammaproteobacteria can be used for biodegradation of hydrocarbons.
T/F
T
The microbe breaks down the xenobiotic and the organic molecule in a process called_.
A. cometabolism
B. chlorination
C. commensalism
D. coupled cycling
A. cometabolism
Complete nitrification requires the activity of both _________and__________
A. none of the above
B. methane oxidizers and ammonia oxidizers
C. nitrite oxidizers and methane oxidizers
D. ammonia oxidizers and nitrite oxidizers
D. ammonia oxidizers and nitrite oxidizers
If a subsurface microbe has evolved to live in areas with low amounts of nutrient, what might be a typical characteristic of that microbe?
A. Grow as filaments
B. Grow as small cells
C. Grow as very large cells
D. Secrete a slime layer
B. Grow as small cells
Which of the following represents increasing microbial diversity?
A. cell-community-population
B. guild-community-population
C. population-guild-community
D. community-guild-population
C. population-guild-community
In the oceans, sulfur exists primarily as
A. hydrogen sulfide (H2S).
B. elemental sulfur (SO).
C. gypsum (CaSO4)
D. sulfate (SO42-).
D. sulfate (SO42-).
In prokayrotes, photosynthesis occurs in chloroplasts
T/F
F
Which of the following is not a degradation product of organic material?
A. Carbon dioxide
B. Oxygen
C. All are degradation products
D. Methane
B. Oxygen
Ecological theory states that for every organism there is at LEAST one ________, and the microenvironment where the organism is most successful is called the ________.
A. prime niche / niche
B. community / population
C. niche / prime niche
D. population / community
C. niche / prime niche
Which treatment method(s) are used in primary wastewater treatment?
A. Biological, chemical, and physical separation
B. Biological only
C. Physical separation only
D. Chemical only
C. Physical separation only
What adaptation allows organisms to tolerate high pressures in the deep sea?
A. increased unsaturated fatty acids
B. decreased lipid content
C. increased ribosome size
D. decreased cell size
A. increased unsaturated fatty acids
A chemoorganotroph and a photoautotroph in the same environment would NOT compete for
A. carbon.
B. carbon and oxygen.
C. oxygen.
D. nitrogen.
B. carbon and oxygen.
The most abundant oxygenic phototroph prokaryotic organism in the ocean is of the ________ genus.
A. Prochlorococcus
B. Pelagibacter
C. Roseobacter
D. Puniceispirillum
A. Prochlorococcus
In the soil, oxygen concentrations are highly variable even within a soil particle. The center of the particle may be anoxic even if the outer portions are oxygen rich. In this context, obligate anaerobes could be found
A. in the center of the particle
B. Nowhere on the particle
C. throughout the particle
D. at the surface of the particle
A. in the center of the particle
Which of the following is an example of a biofilm?
A. Marine diatoms
B. A planktonic microcolony
C. Dental plaque
D. Transient skin microbes
C. Dental plaque
The process by which electrons from the quinone pool are forced against the thermodynamic gradient to reduce NAD+ to NADH is called reverse
A. reduction.
B. proton motive force.
C. reverse electron transport.
D. forward electron transport
C. reverse electron transport.
Bioremediation is the ____
A. usage of anaerobic bacteria to create new antibiotics.
B. usage of microbes to create new organisms.
C. usage of aerobic bacteria to create new vaccines.
D. usage of microbes to destroy environmental pollutants.
D. usage of microbes to destroy environmental pollutants.
In what community would you find fermentative bacteria?
A. Photic zone
B. Anoxic sediment
C. Any of theses communities
D. Oxic zone
B. Anoxic sediment
In photoautotrophy, what do the light reactions produce?
A. Carbon dioxide
B. Carbon-containing molecules
C. Energy / ATP
D. Chlorophyll
C. Energy / ATP
Potable water is NOT safe for human consumption.
T/F
F
The product of dentrification is:
A. NH4+
B. NH3
C. N2
D. NO3-
C. N2
To further reduce the possibility of biological contamination, most treatment plants treat the effluent with
A. ozone.
B. chlorine.
C. fluorine.
D. extreme heat.
B. chlorine.
The path of electron flow in oxygenic phototrophs is referred to as the ________ scheme.
A. Z
B. S
C. E
D. Q
A. Z
Two major environmental extremes of the deep sea are high ________ and low ________.
A. pressure / nutrient levels
B. oxygen / pressure
C. temperature / pressure
D. nutrient levels / pressure
A. pressure / nutrient levels
- Which metric describes the proportion of EACH species present in an ecosystem (community)?
A. species richness
B. species abundance
C. species evenness
D. species diversity
B. species abundance
